Having grown up north of where we're driving I can say yes, there is more scenic, fun to drive gravel roads than paved in ontario. Try hitting some north of Gravenhurst! Mondo fun! But, you need a beater to do this.
Ear popping yes - lots of roads around for that
I'm curious what your milage was on the dry-run. I guestimated it at about 350.
FOTC does suck on weekends. Too many bicycles and 70 grandpas taking in the scenery. Even still, nice to drive. Can be avoided by going north (can't remember road) just as you exit Belfountain heading east. But you miss all the fun. I've gone up there a few times first thing (i.e. 5am in July). Lots of fun, no cops.
See you in a few