Canoeing Southern Ontario

Where is a good place to go canoe camping in Southern Ontario?
I am by no means a rookie Tripper canoe. I'm just looking for a new place to explore. I'm going for a few days and the Great Lakes are too big to do in that amount of time. Also i dont want to pay for a guide to show me those places, I know where and how to get there and then Ill do the rest.
http://www.canoecanada.com/
Paddling the Mill waves, Grand River Ontario