Ok, it's easy to find. From Southern Ontario get onto the 400 highway and go North to Barrie. Once you pass Barrie you will need to continue North on the 400 highway towards Parry Sound.
Once you pass Parry Sound travel another 10 Km and turn West (left) onto highway 559.
This highway leads right into the Park. Make sure to turn left before Dillon Rd.

See you soon

Mike