You may be a little disappointed in the off-the-vine flavor of your Triple Crown blackberries, as from my experience having grown them and other trailing thornless types, they arent very sweet per se. You have to pick them at just the right time in order to get any sweetness, and if they appear fully dark colored, but still slightly hard, they may not be ready yet. So you cant necessarily always go by the color of the berries alone. You have to wait til they have turned dark purple and the individual berries have swollen somewhat before they are fully ripe. Even then they wont be as sweet as a black raspberry for instance.

2 isn't carrot. One of the many umbelliferous plants in the Apiaceae. I don't know what would be normal in your area. Here it would be Anthriscus sylvestris, aka Cow Parsley. Does no 1 have a smell? it looks like Lettuce Leaf Basil. And yes, in future you'd do better to start your own thread.

I don't think you can really loose on this one. You really have to look at the site and decide. Here is another combo I found of the two. Here is a link that might be useful:

If you're lucky it's huckleberry. There is a tree form in eastern OK and western AR.