The second leg travels across some very remote country. Although there are fuel and supplies available at various points, they usually require a side-journey.
Places to fuel and eat are:
West Burke or Barton, VT
Island Pond, VT
West Forks, ME
Much of this area is outside reliable cell service. If you have a break-down, it can be a while before anyone will wander by. Be well prepared.
The updated file, changed to avoid private lands, is in post #10.