Welcome to RV Park Reviews. There are several Ontario Provincial parks along your route, they are like State Parks, but have no individual water hookups and most have only 30 amp service. You can check them out here:http://www.ontarioparks.com/english/ont_map.html
Be advised that they have mostly smaller back in sites and electric hookups may be far from your site, a 30 amps extension is a must! I've camped in Samuel de Champlain, Driftwood and Fitzroy in the area, and to my knowledge only Driftwood has pull-through sites long enough for you.
You may also want to go through Algonquin Park, it does have all kinds of sites but is very popular for outdoors enthusiasts so reservations are a must, and depending on the time of your travel it might be booked out already.
Private campground operators in Ontario have their website here:http://www.campgrounds.org/Home.aspx?PageI...enu-menuItem000
I've camped in Sid Turcotte Park, Mattawa, and it was ok, but that was quite a few years ago, I don't know the present state of the place.
In the Ottawa area Sleepy Cedars and Poplar Grove are better choices, but nothing to brag about. If road noise does not disturb you the municipal campground seems to be good, but I have no personal experience with it. Their website seems to be down at present.
In general I would like to remind you to prepare for BUGS in major quantities between Sault-Sainte-Marie and Ottawa. Have you picked your campground for Montréal already?