Hmmm. Residents of Maine must pass through New Hampshire en route to the United States. Now it's not safe. They'll have to fly out or take a lengthy detour out to sea.
OTOH New Hampshire buffers Maine from the United States and we still are allowed to have private property here, which we can rent from the government at very low rates. "Live free or not."
It is also possible to head north to Quebec and then down through New York.