You can go out to West Marin. Spend the time hanging out on the beach with your pup. You can camp out at Olema Campground or check out the inns in the area. Since Point Reyes is a national seashore, not much is allowed out there. Here is a listing of beaches available to you. Dogs must be on a leash at all times; the leash must be no longer than 6 feet.
All trails within the park are closed to dogs - with the exception of Kehoe Beach trail and designated trails in the neighboring Golden Gate National Recreation Area.
Dogs are allowed on the following beaches:

Kehoe Beach - north of the Kehoe Beach trail
Limantour Beach - southeast of the parking lot to the beach adjacent to Coast Camp
Point Reyes/Great Beach - from the North Beach parking lot to the south
Palomarin Beach - no longer open to pets
Due to threatened snowy plover habitat, dogs are not allowed on the beach south of the trail at Kehoe Beach or on the beach to the north of the North Beach parking lot.
During the elephant seal pupping and mating season (December through April), dogs and humans are not allowed on the beach south of the South Beach parking lot.
Dogs are allowed in the Bear Valley Visitor Center parking lot and picnic area.
Pets are not permitted in public buildings, on public transportation vehicles, or in locations designated as a swimming beach, or within any structure or area closed to the possession of pets by the superintendent. This prohibition does not apply to guide dogs accompanying visually impaired persons or hearing ear dogs accompanying hearing-impaired persons.
Leaving a pet unattended and tied to an object is prohibited. = PER OFFICIAL WEB SITE
I think Point Reyes Station has a small parade on the fourth, but there are a number of places to stay just south and just north of Point Reyes Station, where you can avoid the noises. There are plenty of places to walk your dog outside of Point Reyes Proper, hiking at Roys Redwoods in the San Geronimo Valley, hanging out at the top of mount Tam and taking advantage of the sights from the top of the mountain, there are a number of good hikes you can take your dog on while on Mt Tam, or stop at the Cowgirl Creamery in Point Reyes Station and take a picnic up the mountain with you, a nice blanket and a place to view the world go by would be nice (be prepared to check yourselves and your dog for ticks). You can take your pup to Muir Beach and there are some good places in the Marin Headlands (I would avoid being that close to the bridge on the fourth) China Camp historic State park is a good place to spend the day though your dog is not welcome to get out of the car in the park it is a good place to check out and whittle away some time (stay away from the North end, this is where the Civic Center is and Im certain during the fair - the area will be full of kids with poppers etc.) If you stayed at Pt Reyes you could drive up the coast to Ft Ross, dogs need to be on leash, Bodega Bay Drive out to the Bodega head for some good beaches out of the wind. There are enough trails and open space areas in Marin to take your pup that even a couple of days away just before and a day or so after the fourth, and you might get away with not running into fireworks. You can park near Tacaloma and use the multi use path which goes into Samuel P Taylor Park. a couple miles worth of level hiking next to papremill creek. Woodacre has a fourth of july pancake breakfast the fire department puts on and a small parade so I would avoid that area until after noon. Five Brooks has some good trails, horse poop laden if your dog is into that. You could head over to Concord and hang out around Mt Diablo tho that area is a little bit on the too hot side for me. Staying on the west side of Marin and Sonoma Counties, would be your best bet, you might be able to rent some sit on top kayaks at Tomales Bay ( one single, one double) and take the pup for a nice cruise of Tomales bay from the water...There are so many places in Marin you can take your dog without issue. Mill Valley has a dog park, Corte Madera, has one, Terra Linda @ Mcinnis Park - near a golf course where you can walk out to the bay on a huge levee system. ***This might be a little too close to the fair for your furbaby. Go get yourself Doing the Bay Area with your pooch, there is a California one as well. It will give you places you can eat and stay over with your dog, the information is great to have and I have take my dog to many of them. If you want a place a little farther away - go to Sequoia National Forest or Yosemite National Park - you wll be less likely to run into the fireworks crowd. I know Lake Tahoe has a fireworks show and it can get very congested up there at this time of year. Still further away is Mono Lake and Bodie. Not quite a days drive. Check with the Chamber of commerce of Bridgeport, Mono and Lee Vining to see about fireworks. I live in Marin and I have to dose my dog with rescue remedy or take him for a nice drive over to the Nicascio reservoir area, up and over Lucas Valley Road. I usually get a campsite at Samuel P Taylor State Park, but this year I waited too long and got a later reservation...I think the closest place for you all without crossing the bridge would be Fort Funston or Edgewood County park (I dont think dogs are allowed there) and I know of Mori point, down by Pacifica. But your access to areas without people lighting off illegals on the penninsula would be more limited, mabe Moss Landing, Elkhorn Slough?? Good luck with whatever you decide.

Canada? Their Independence Day, Canada Day, is July 1.

I'd talk this over with your vet and find some better meds to put her on and keep her on for several days. I had a dog who had to be pretty much unconscious for half a week once a year. I have 4 that are phobic, but not to this extent. We give melatonin for thunderstorms and fire crackers but have a call in with the vet to see about the 4th. Our new neighbors love fireworks and its gonna be hell around here. If its bad enough I might join them in taking a few pills.

Thanks to everyone who replied. Janegael--we have been working with our vet. We used to crate our dog at night--and one July 5 morning we discovered that she bent the metal in her crate and broken her nails trying to get out. She was a wreck that morning and wouldn't get near her crate--which she used to love--ever since. For a few years, we were able to tranquilize her, and she'd sleep through the 4th, but she developed a sensitivity to the medicine. So now we're trying a doggie version of anti-anxiety medicine, which calms her down, but we have to start it a few days before the 4th for it to kick in, and she still gets pretty upset. We;ve tried melatonin and Rescue Remedy, but they are not much help if there's more than one or two loud crashes. It's pitiful to see her shake when she gets so scared. Then she gets frantic and once was so desperate to get outside and start running that she tried to hurl herself through a window. Funny thing is, she can listen to the loudest crashes, gunfire, and thunder on my husband's fancy entertainment system and it doesn't bother her one bit. Since it's only a few days a year, my husband and I will sit with her in shifts, and do our best to save her from herself. We might even turn on the TV really loud, and see if that masks the sounds from outside.

I understand completely - our friends dog - home alone, during a parade a couple of weeks ago - threw himself out of a second story window breaking 2 legs and causing some serious internal damage, when the owners got home, my friend called for the dgo and went into the backyard, saw all the broken glass and saw sometihng crawling around, thought it was a possum, until she realized it was her Shiba Inu, covered in blood unable to walk - he is okay now, but lets go the extra mile for these guys....Sebastopol, Occidental, all sleepy little places without much going on

Take him to state park or airport walk around no firework

These suggestions are very helpful -thank you. My 3 year old Morkie is also deeply phobic Canada sounds perfect!

This is an old post but the only place we've found without fireworks on July 4th are the campgrounds in the national parks. Think Yellowstone and Grand Canyon. Due to their care of the wildlife and trying to protect against wildfires the anti-fire work bans are aggressively enforced. They are the best, most peaceful place to be during July 4th.