We did the northern half of the Trace a couple of years ago in the bus with toad. Absolutely no problems. The road is fine, and we pulled off for several sights and the pull-offs and parking were adequate.
I found the Trace itself kind of boring it seemed like we were on and endless national park entrance. There was not much to see cruising along; although you are near many towns, you don't see any of them. We did enjoy the stops. We ended up getting off the Trace and using conventional roads. I felt that gives a more intimate look at the towns that define this part of the country.
John & Janene Browder
Knoxville, TN
2008 Marathon H3-3S