It will happen. If you are still lost and it's around six p.m., find a place and camp for the night. Do not try to find your way in the dark. It is very dangerous and the mosquitoes may pick the flesh from your bones and all that will be found is your canoe floating on the lake and your skeleton in the bottom of the boat. The opportunity for seeing wildlife in the park is outstanding.
Bears can make life very interesting.
There is a reason why your outfitter tells you to hang up your food pack. You see, since bears have figured out that canoes equal food, they love for you to camp in their park. If you camp on a well used campsite, take the time to look around for certain signs, like bear prints, trash, or bear dung. If you see any of those things, I would suggest camping somewhere else, unless you would like a late night visitor to your campsite to liven up your evening. Never, ever take food or toothpaste, cologne or anything with a strong odor into your tent.