That was a good outing to see so many critters. How fat was that snake. Aren't cottonmouth snakes dangerous. If so, that was close enough. I like 1, 2 and 3 the best.
Nice outing and some good potential subjects. I think you're a little off in your composition but there's too much to comment on here.
I gather you do not have a circular polarizer... you NEED to get one. It will cut down on glare, saturate colors, and just generally help you in overbright light.
Also, watch out for subjects in mixed light (dark and bright). Cameras have a hell of a time with this (as you can see).