As I was reading this thread, I couldn't help thinking a wood gas stove would be a great survival stove.

I don't think it would help canoedogs though as it probably wouldn't fit in a vest. But would probably be very handy to carry in the canoe.

For emergencies, a little candle lantern would be handy. As mentioned, that under a tarp or poncho or trash bag would probably get you warm and it's multi-function. I have the UCO and mini-UCO candle lanterns. Those would certainly fit in a vest pocket.

And I always carry some fatwood. That is great stuff especially when you need a fire and it's wet out. Although granted, I haven't had to start a fire while getting hypothermia. Only had to do it wet and cold, but not that cold.