-- Last Updated: Mar-03-13 3:26 PM EST --
Well, you describe a situation of getting out of the comfort zone for you and your boat. It sounds like it was more a consideration of paddling power than boat capability, since a motor won't make the boat any more capable in waves. It sounds like you are more interested in ease of travel while fishing than the experience of paddling, which of course is okay.
Anyway, here's some stuff you might want to consider when fixing yourself up with an electric motor. First, nearly every state (perhaps every state) has boating rules which exactly follow the Coast Guard regulations. In that case, the battery must be covered, which is easy to do (get a plastic battery box). Also, you must secure the battery so that it can't tip over or slide around, and that's usually not so easy to do. Anyway, the combined weight of the motor and battery will likely be close to 150 pounds, and unlike virtually every OTHER kind of heavy item commonly carried in canoes, this stuff sinks like a stone. Many canoes have just enough floatation to keep them from sinking, and if that describes your boat, you might lose it if it ever tips over or gets swamped in big waves, because the battery and motor might take it to the bottom. For some boats (maybe most), you'd definitely be wise to add additional flotation. Most people don't do this of course, and though there's not exactly an epidemic of canoes being lost this way, it's something to think about.