I've been doing a lot of reading lately about different styles of boats, and their uses. Everything I've read tells me that canoes are the most efficient design in terms of fuel economy when using a small outboard. The only drawback I see with a canoe is they have a relatively low weight capacity. As an example, my 17' Coleman square stern has a max capacity of 770 lbs. I couldn't take a buddy out after moose and stay within that capacity if we were successful in harvesting one.
I recall reading references to where folks have added buoyancy to boats via various means though - have any of you here tried anything like that? I'd be interested to hear how it worked if you have stories.