We did a NE tour: Niagara Falls (smells like a sewer), the Fingerlakes (excellent KOA), We stopped at some historical fort in NY then into NH and VT to Bar Harbor for a week, then down to Boston (stayed at some state park south of Boston and rode the Ferry), did Concord and Lexington. The down to DC, stayed at Cherry Hill. Let me tell you one Boston and DC are HOT and muggy in July. People complain about the western states but I'd say the NE is just as bad. Not Maine of course.
Arcadia is like no other major NP that we ever visited, it is split into small units scattered up the coast apart from the Bar Harbor unit. There are islands off the coast too. The photogenic area is north of Bar Harbor.
A major goal of our trip was to see a lot of American historical sites. Boston is very interesting but as I said really hot.
One thing I recall was people warning us our F-150 (5.4L) pulling a smallish TT (Trailmanor) would have a tough time with the 'mountains' in NH and VT. We did see some hills but missed the 'mountains'. F-150 didn't even notice them.