Are you talking about the one in Manitoba, northwest of Dauphin? I've camped at Childs Lake a few times. Excellent campground. The water is crystal clear, and apparently scuba divers like going there for that reason. The last time I was there I had a canoe with me, and I paddled across the lake to the lodge for breakfast, and then paddled back. I had the lake to myself that morning, except for the loons. I didn't have any problems leaving the canoe at the boat launch area, although I did take the paddles and life jackets with me.
Duck Mountain Provincial ParkChilds Lake CampgroundBlue Lakes CampgroundWellman Lake Campground