For Montreal, Camping Allouette is the place for big rigs. It is easy to find from Highway 20, near Beloeil, south of Montreal. For Ottawa, Recreation Land Campground on Rte 174, east of Ottawa is nice. We stayed there for two months in 2004 while in between houses. Owner lives next to it so it is wel kept. For Quebec City, the KOA near Highway 20 in St-Nicolat is convenient, so is Camping Valcartier, on the north shore, which is just a few years old.