I fly fish out of my 14’ Jon boat all the time. I can stay seated or stand up. You can float or run it up on the bank. I use a trolling motor for power and always carry a paddle for pushing if needed. Rivers always have potential risks from flow so make sure to watch release flows. I catch bass, catfish, carp, buffalo, gar, sunfish, etc. Having a carp or big gar tow you around on a fly rod is really fun.