Camping in Ontario?? Chances are you will come within 10 minutes of my farm!! Y'all should drop by. Tell me if Coboconk or Brechin are on your route.
I have no idea where those are, but we will be taking the ferry across the St. Clair River, heading up along the Lake Huron coastline to Bruce Peninsula, and staying at either Sauble Falls or Bruce Peninsula, then going on a waterfall hunt in the countryside around Owen Sound before turning homeward.
I'll check a map but I have a feeling you're a couple of hours east.