Route from Maine to Gatlinburg? Least traffic?

schlep1967.....wow! Thanks for the suggestions! This is the next thing I'm going to start working on.....finding what to see and do along the way. We have the first part of our trip in the Maritimes nicely worked out, but I'm just starting to figure out what to do as we travel down the eastern seaboard. I'll check out all of those places! Thanks!