Moki Dugway (Rte. 261) in Utah. The Dugway part is about three miles long but not paved (don't go fast or else you are over the cliff). The highway south and north of there is great too. The Natural Bridges National Monument is just north and west. When I last went, only two other people were there (and that was June). Moab is just up the road to and then Bonneville beyond that.
The Bighorn Mountains side road Primary Forest Route 26 is very empty and a great drive.
NF 90 (Wash. St.) is great way to see Mt. Helens without the crowd. 120 (Calif.) on the way over the Sierra Nevadas towards Yosemite is a bit more crowded but quite nice.
There are some roads in Death Valley that are fun to drive (and go airborne on) such as Artists Drive. Again, not many people there in May onwards to October.
In Ontario, the drive from Port Carling to Rosseau is good and continuing on to Huntsville, through Algonquin Park and then Ottawa is not bad.
The best pizza is in Prescott, Arizona at Bill's Pizza
Home Page - well worth a three to four day drive from Ontario. The town also has some large get togethers for SLED (vette) owners.