There are many outfitters near Algonquin. Some IN Algonquin
Algonquin Outfitters.. Brent and Opeongo.. ( no shuttle needed to get on the water)
The Portage Store
Algonquin Bound
From South River
Swift canoe rentals. Just let your fingers google. Depending on where you enter you may want a different rental since they are scattered around popular entry points. Ergo no shuttle needed.
I am a little biased toward the Kiosk entry point.. Manitoulin Lake has so many beaches. Its on the north side near North Bay. And has its own outfitter
North side outfitter