Betty,

I haven't taken that route, but according to my aging Rand McNally Tripmaker Deluxe (1999 version) there are KOAs located in Windsor, London and Toronto.  While IMO KOAs aren't necessarily the "cream of the crop" for campgrounds, normally they offer at least acceptable accomodations. It also lists several family campgrounds between London and Toronto, but nothing between Windsor and London.  I would suggest visiting a "Barnes and Nobles" type book store or Amazon and get a copy of either Woodall's or Trailer Life Campground Directories.  They "rate every campground and include type and description of access and interior roads; park elevation; restrictions; number and description of available sites; description of basic facilities, amenities, recreation, and last year's rates".

Happy Trails.............    George