Thanks for all the responses guys!
The bed-liner idea is mine (well, sort of, I stole it from MythBusters to be honest), it's a theory I have on making what might be an otherwise fragile boat (the skin-on-frame in particular) into something a bit more robust. If that stuff could save a brick wall from a stick of C4, it should be able to save a canoe from a sharp rock, yes? I'll take an extra 5-10 lbs in weight over having a hole in my only means out of the bush any day.

Thanks for those links guys! First glance looks promising, I'll check them out more thoroughly later.
As for the Stitch-and-Glue needing glassing, yeah, true. But it needs a lot less glassing then a full fiberglass or even a stripper. I'm looking for a minimum of glassing, unless one of my co-builders will step up and take that bullet for the team.

I will post pictures of us building it once construction commences, hopefully next week. And of course a trip summary once we get back. I'm looking forward to this, if the damn ice ever melts, that is... >:(