I went on a trip up there (albeit in a car, not RV) awhile ago. While in New Brunswick, check out Magnetic Hill in Moncton. It's an optical illusion where you drive your car (or RV?) "down" a gravel road, stop, put it in neutral, and then coast back "up" the hill. But it'll baffle you trying to figure out why you're coasting uphill. Really neat. See more info at www.magnetichill.com . I think there's also an amusement park near there.
After that, we looped up to Campbellton, New Brunswick and then followed the coastline around the Gaspe Peninsula in Quebec (toward the town of Gaspe). Then proceed north around the peninsula, then looping west and then finally southward along the St. Lawrence River thru towns such as Ste-Anne-des-Monts, Rimouski, Riviere du Loup, then into Quebec City and then Montreal. The north part of the Gaspe Peninsula is absolutely beautiful with the winding roads take you down thru some very quaint (entirely French) towns, each with a distinctive church steeple which is the first thing you see as you decend down into the town. People are sitting out on their front porches waving to you. But it's entirely French way up there, so it's like you are on a different continent! Take your French language book!
Gary