I had the brilliant idea of driving my 31 ft MH (previous coach) from Asheville to Virginia a few years ago. Northeast of Asheville, the tunnels were much taller and I had no problems staying safely in my lane but, oh my, what a slow painful ride it was. I was well below the speed limit annoying everyone behind me and couldn't enjoy the parkway at all because I was focused on steering and staying in my lane on the curves. I think I averaged about 20 MPH and after 3 hours of that, I abandoned my plans and got off the parkway.
Of course I ended up on the windiest, smallest side road to get off the parkway to the highway and I vowed never to attempt that again.