I have considered float tube fishing for trout in trout waters. By that I mean colder waters (tail waters, rivers below dams) where I enjoy wade fishing, but I would think twice about it in warmer waters. Snakes, turtles, and alligators are enough to discourage me. If you still want to go that direction, I would suggest looking at some Youtube videos and look at Bass Pro, Cabelas and retailers like them. Look at weight capacity, size, ease to pump up, packing size... I know this wasn't specifically what you asked but I hope this might steer you in the right direction until others chime in who have them and use them.

"Snakes give me the willies!" --- quote from a wise old man