thanks to YouTube, I found this place near Bala, Ontario (only about 1.5 hours north of Toronto). Known as the Torrance Barrens. They have proper trails and a few lakes. A short drive to Bala which is on Lake Muskoka and a nice tourist area.
My file sizes are much too large for this site but they can be found on Flicker at:
In the first site I was in, most Class B's would fit OK. Class C's would be a touch too wide and possibly wouldn't be able to drive in some areas. I did see some 25 - 30 foot trailers in there too.
Haven't finalized any videos of the area but will update this once I do.