I have heard that there are some nice spots in Massassauga but I've also heard that there can be a lot of motor boat traffic. Overall I think it will offer more sheltered paddling than you will find in Pukaskwa National Park.
How long a trip are you planning and what are you looking for in terms of open water, sheltered lakes, portages, etc?
Canoe/Kayak Storage Racks
Kayak Motor Kit
Kayak & Canoe Outriggers