I picked up a used coleman 15' as well. Someone was basically giving it away for a bill (canoe, oars and 2 vests). A little tough to get on the top of the truck on my own but I can manage it. Haven't had it on a river. I'd feel much more comforable with an inflatable something in rapids.
On a side note, some people are not canoe people. A quick tip <har har har>... if they seem a little skittish, try a paddle before you load up gear. Trust me on this one.
That flat back that Beerfly has sounds nice.
