Visiting Montreal and Quebec City

Quebec City: Usual CG is the KOA on the south shore. Not very scenic, but they have shuttle to the central city, where you certainly don't want to be driving an RV.
Montreal: if it is a hot and muggy day, head underground to the vast interconnected spaces in the central section. Other sights: Mount Royal Parc, St Joseph Oratory, Botanical Gardens. And go to Schwartz's on St Laurent for an iconic smoked meat sandwich.