Only use round tubes, Oklahoma Pride in the largest size is the best one I have ever used. Been tubing for 35 years and have used alot of different brands. I use diver fins all the time also. I like to lean forward when really serious fishing so I do not like the open fronts. Just does not feel right, can't teach an old dog new tricks.
20' Skeeter, 200 Yamaha
Oklahoma Pride Big John Float Tube