You might consider continuing up the St. Lawrence River. Riviere du Loup, Baie St. Paul, etc.

The old road along the river meanders and we saw some old bread ovens by the road when we last went that way. http://tinyurl.com/pxn3f

St. Jean Port-Joli is well-known for wooden sculpture. http://www.chaudiereappalaches.com/

Some years ago we went to Ile aux Coudres which was interesting. Saw peat harvesting! http://tinyurl.com/oqdcn There are ferries: http://tinyurl.com/nu7gm

On the north shore is Charlevoix: http://www.tourisme-charlevoix.com/en/accueil/index.asp Further on across the river is Tadoussac which is on the Saguenay River and is fjord-like. Whale watching centre. http://www.quebecweb.com/TOURISME/charlevoix/

Of course, further along is the Gaspe.

You asked about St-Jovite and Mont-Tremblant. There is a resort, Tremblant as well as the old town of Mont-Tremblant. The whole area is good for restaurants and the National Park is great. The Disney-like Tremblant is not the "real" Quebec but the area is pretty, good food, and easy to visit - condos available for weekends and longer as well as hotels and B&B's.

Frances Toronto, Canada