I've no experience with what you question, but I'd guess it'll move ya along and be less work than a paddle.
my question is, what happens to the battery when you tip it upside down. if the battery falls it goes to the bottom. if it gets wet, it's a dead short + to -.
lastly, i've got a canoe, it isn't licensed or registered as it's human power, by me. however in my state (yours may be different rules) if i put any type of power (ie trollilng motor) on it, my canoe must be registered and get some numbers. that i gotta pay the state for. i like not paying the state and i don't mind paddling as i have nothing to maintain at all other than my paddle. and it's pretty maintenance free... and that makes me smile.....
good luck and i hope it works well for you.