For those as locationally challenged as I, Tobermory and Manatoulin, are in Ontario, Canada. Mapquest does just fine if you give it the right province (ON). Tobermory's on the eastern side of Lake Huron, 700-some miles and 10 trailer hours for me, so this one's a possibility.

Obviously this is a completely different trip than the one planned by the Midwest Mac group. I'll be keepping an eye on the planning, dates, etc and decide later whether I will try this one or stick with the "local" group, NE-TS.