A short narrow jonboat is a good device to find invent new ways to drown and entertain spectators.

I won't get in one less than 14' and at least 48 in. width, the wider the better for stability. It's easier to cast a flyrod standing up, and width helps in the rocky and tippy department. Life is much easier traveling with it on a trailer, and if you get into the safe size of boas, you won't want to be lifting and putting it on top.