I had to laugh when I read Boyscout's comment - a permit to put a trolling motor on a canoe. Here in Pennsylvania, you can hardly even put a canoe in the water unless you you have it registered And to make things even more interesting, here's something I found in the regulations:

Note: Boats with unpowered boat registrations may NOT be equipped with gasoline or electric motors or any other mechanical propulsion and be operated on Pennsylvania waterways.

So we're already there.