Just a thought, all, but look at the "on the water" picture that Canoedogs posted. IMO you have to stand out clearly from that distance, otherwise potential rescuers won't even notice you. That means hoisting a blaze orange volkswagen (or equivalent) about six feet off the ground.

Walking out is probably not a viable option. There's a good reason why parks in shield country are "canoe friendly." Mostly the only way to get around is by boat.

Canoedogs, if your gut tells you to use some sort of personal locator, trust that instinct. I've done a lot of solo work, mostly backpacking, but a bit of river stuff too. No matter how good you are, or how conservative your actions, there's a very small margin for error, and we all cross that line on occasion. Safe journeys. Doug.