The route we take from NJ includes I84 to I90 (Mass Turnpike) to I290 near Worcester to I495 around Boston to join with I95 just before the NH border. We get off I95 onto I295 just before Portland and then pick up Route 1 near Brunswick, then Route 3 from Ellsworth to Mt Desert Island.
We like to spend a night at
Camden Hills State Park and have dinner in Camden. The view of Camden harbor and Penobscot Bay from the top of Mt. Battie is beautiful. Further on is
Fort Knox (not the one with the gold).