Rented canoe? Just use the dealee bobs and attach to thwarts and seat without tubes is the way I would go and just use a bit of caution when loading and unloading. That is what I have done for many a year and so far without mishap. I like the margin of safety the tubes offer though and without much additional weight.

Bucketmouths? I live a few blocks from the big "O" and my best pal down here is a bass guide for Roland Martins marina. I could go out pretty much whenever I wanted and connect with the big ones. But rather, I guide the guide and we go salt water fishing. The big lake was the draw and I bet I haven't fished it 10 times in 20 years.

Oh had I known I would get addicted to the salty stuff I would of settled on the coast instead of here but it's all good. I'm where I'm supposed to be.