The French River Delta is pretty great. Look for Bear's Den Lodge, they will come pick you up at Hartley's Bay and boat you in. It is about a five minute ride. Walleye, Pike, Small Mouth Bass, and some monster Musky. I liked it there, There is a lot of other places on the French as well I just mentioned that one because I believe the fishing is better on the Delta side and I have been to Bear's Den.
http://www.bearsdenlodge.com/
This is a really good resource as well
http://www.ontariooutfittersnetwork.com/
as well as this
http://www.getnorth.ca/
Good Luck.