Or just do it WRC style with a navigator with good directions. Like a weekend before a few of us who will be leading can go down with our navigators and they can take good notes of speeds and curves, gravel, etc. "Right 3 over crest". That would be epic. I know Tessa would be down for that. But then the more I thought about it, the more I think I should just shut up and keep it to the track. Too many things to look out for on public roads.