The Gaspe route is wonderful. We did it in September. Couple of things:
Some campgrounds and some attractions begin to close down after Labor Day. Not the main ones, and it's okay because places are less crowded. But be aware that not everywhere is open.
Route 132 (really, the only road!) is a long highway, and it's slower going than it looks on the map. Along the south part of Gaspe there is a lot of development, and speed limits and traffic keeps you from making time in an RV. Allow plenty of time. Road surfaces varied -- mostly good, a couple of messy construction zones.
Contrary to my preconceived notions and my unilingualism, I found folks very friendly, and encountered few if any language problems.
Agree with a big star for Forillon National Park. The whole route, IMHO, was wonderful.
There's no easy way through Montreal, but I think the tunnel on the East is better than the bridges to the West.
