Westwood,
I just reread the 2010 Q Wilderness Guide section on boating safety. It makes no mention of any requirement for any canoe to have a spare paddle. It only mentions that each canoe must have at least one paddle, oar, or anchor.
I have no argument with you or anyone who feels that it would be prudent for each canoe to have a spare. Like an insurance policy, the law requires certain minimums, and each person has to do their own risk analysis regarding how much coverage to have...
If I read it right, the poll was more about our actual practice, than it was about law or what we think everyone should do...
This is how I/we do our risk assessment. This year, Snowdog paddled his solo, and I paddled my tandem with a friend. For the three of us, we carried four paddles. SD lashed in one paddle for our spare. Our reasoning was as follows: If SD lost/broke his paddle, he would be in immediate need of a spare, so he carried it. If one of us in the tandem, lost/broke a paddle, our canoe could be paddled with one paddle. Our assumption is that any lost paddle will float and can be retrieved, so the need for a spare is temporary. We also carry duct tape, which can be used with a splint, if need be, to repair any broken paddles. In all of my years of paddling, I've only had two or three occasions where my bow paddler lost his paddle. These were when we were fishing, and he was careless about where he put his paddle, and it slipped over the side. In each case, it was no big deal, as I simply picked it up for him. He always wondered how I got it, when he put it behind his seat...