On timberwolf lake in Algonquin park we set up on an island. In the morning my partner spotted a bear track and what looked to be a freshly raked tree. In the picture perfect morning sunshine it seemed innocent enough. I applauded my pals keen eye as the track wasn't at all obvious and then we went fishing.

Later that night as we locked eyes in the tent with the realization that a bear was just outside and knocking bags around and sniffing through our tent wall we understood that Mr. Bear was living on the island. That was one unforgettable night I tell you as we both expected Mr. Bear to enter our domicile.

Last fall in Georgian Bay country I watched one swim at least 1/4 mile gap of water with ease. I don't think water is a deterrent whatsoever. If they think some food might be found on an island in the way of waterfowl nests, baby moose or frying hamburger ;) they are coming.

As for worrying about them at night while your sleeping you might as well forget about it and go to sleep. With those big padded feet it is extremely likely you will never hear them. Rodents make more noise.