This is from www.mnr.gov.on.ca/MNR/fishing/crownland.html
Where is the French and Mattawa river?
In Ontario, travel for recreational purposes on Crown lands and waters is generally free and unrestricted. Generally, camping is allowed free on Crown land for up to 21 days, at any one site, per year except where posted. (To qualify as a separate site which can be occupied for an additional 21 days, a second camp site must be at least 100 metres from the first location occupied by that camper.)
Non-residents of Canada who are 18 years of age or older, except those using a camping unit rented from a commercial outfitter in Ontario, require a permit to camp on Crown lands north of the French and Mattawa rivers. (A camping unit is defined as equipment used for the purpose of outdoor accommodation and includes a tent, trailer, tent-trailer, recreational vehicle, camperback and any watercraft equipped for overnight accommodation.)
Where is the French and Mattawa river?
Crown Land Camping Permits are available from numerous fish and wildlife licence issuers and from the Ministry of Natural Resources district offices in northern Ontario. Cost of a Crown Land Camping Permit is $10 per person per day.