Watchorn Provincial Park is a small, secluded campground just south of Steep Rock. It has both basic and electrical sites. It has 8 walk in sites (#49 - 56), and by walk in I mean a very short 50 meter walk from the parking lot, that sit on the beach overlooking the water. The sites are not private at all, but if you set up your tent facing the water you will get amazing views both at night and in the morning. Be sure to go for a sunset swim.
I wouldn't go here just for the camping experience, but I would stay again to use as a base camp for Steep Rock. And be sure to take advantage of the free firewood on site.