Am leaving New Hampshire on a 30 day adventure which will take me into Canada then back into US at S. St. Marie then west to ?? sure could use some help on the Canadian portion. Am thinking of Cornwall-Smith Falls-Rt.60 to Huntsville then Parry Sound, continuing on Rt. 69 to Sudbury; Leaving Sudbury via 17. Am I asking for trouble going this way? Planning on 70 mile legs. Seems there are enough towns in which to rest, get supplies, etc.. Any thoughts??
Arch in NH

Not much help for most of your route but beware Hwy 69 Parry Sound - Sudbury is a very fast and heavily travelled stretch of road. There are wide shoulder through most of it.