We are working on a trek for next season and I am thinking about heading down via interstate 81 south from PA (Harrisburg) to TN (Bristol)and want to know how this route is from anyone who is familiar with this highway? I know it is a popular route for trucks, so I hoping that this will be fairly well maintained as a result. It's the best route for us based on my preferred stops and final destination, so hopefully the feedback is positive.