I just busted out my round Buck's Bag belly-boat float-tube for some high mountain lake fishing. It worked fine for being 10+ years old. But I forgot how cold your feet can get after dangling them in mountain lake water for 6 hours straight. I have not used a pontoon style tube. I can imagine they make for a better casting platform sitting up higher than chest deep, but the thing that concerns me would be your exposure to the wind and it blowing you around, the ors getting in the way, can you row and fish at the same time, as well as the added weight of the pontoon boat over the belly boat style. I am considering an upgrade. Was looking for some feedback from anyone with experience with both types. Oh and by the way I happen to be 6'6" & 310lbs. and I hate unexpected cold water swims in goretex waders.....don't we all.