I am in the Fort Myers area and was in the same boat as you a while back. From what I understand is this, any of the three will work. p77 seeds are much smaller than the others so your pounds per thousand will be about half of the other two. yukon is cold tolerant, so that aspect is useless for your location. I would try to see if you can go and visit a sod farm and look at the three varieties and then see if there is a subtle difference between the three that you like more or less.
I think that no matter what one you pick, it will grow well and you will be happy with it.

Mix those three seeds together and spread at a rate of 3 pounds per 1,000 square feet. The time to seed for your area would begin next May. Bermuda seed needs hot soil to germinate. If you try before May you will get some germination, but you won't be happy with it. We see those questions here every spring. Never mind that you can find bermuda seed on the shelves beginning right after Christmas. The time to seed for you is May.

The best thing you can do now is water, mow, and fertilize with an organic fertilizer like corn meal, alfalfa pellets (rabbit chow), soybean meal, or Milorganite. The application rate is 15 pounds per 1,000 square feet.

If you think you want to do something to your soil/sand now or later in the spring, please ask here first. It's a lot easier to not make a mistake than it is to fix it later. When you get ready to seed, let us know and we can guide you through the process to minimize weeds and prevent long term problems. Bermuda is something you want to get right at the beginning. Rototilling is the biggest mistake people make.

Bermuda is the highest intensity type of grass you can have, but it is great looking when you're doing it right. Here are the general care guidelines:

Deep water based on air temp. With temps in the 90s, water once a week. With temps in the 80s, water once every 2 weeks. With temps in the 70s, water once every 3 weeks. You can start that regimen now. Time how long it takes to fill several cat food or tuna cans placed around the yard. That is the time you will water from now on.

Mulch mow at your mower's lowest setting, 2x to 3x per week. In the early spring you will be mowing 3x per week.

Fertilize monthly with a high N low everything else fertilizer beginning after the spring flush of new growth. Once a year, or more often, hit it with an organic fertilizer to keep the soil microbes happy.

If you're really committed to seed, any of them will work but maybe pick one with an optimal height that matches the mower you intend to use. If you plan to use a rotary, don't bother with those that are happiest at a half inch, for example, because you'll need a new fancy mower to see any of that benefit. And a million pounds of nitrogen. My personal recommendations are from my own marginally successful experiences in both seeding & sodding--Dont bother with the seed, you waste a few hundred bucks & a whole year waiting. Bermuda Sod is cheap, can be laid anytime & spreads like crazy. Less fertilizer, less waiting, less weather watching. And you can choose some really nice cultivars. That said, my golf area is seeded Bermuda triangle on sand base & I love the fine blades on it. It really cuts well & is just a shade or 2 darker than the 419 lawn around it.

Good point about what kinda mower is going to be used. Medium density seeded or sod types, are best if you have a rotary. High density , lower growing types look better with a reel. Bermuda triangle looks pretty good with either mower. If you go with Triangle, you gotta be patient at first , because one of the components (Mohawk) has a very rapid upright growth habit at first, and then as it gets established, it lays down and blends better with the other two components ( Sultan& Sydney) . I planted it one time , and was pissed off because i thought it was a total dud , and then it turned out to be very nice after it was completely established.

Vincent, which one did you choose?

Can you share the experience, please?