I know you will get some wonderful tips from people who actually live in the areas that your will be visiting, but I thought I would tell you about some places I've enjoyed as a tourist:
Mystic Conn (Mystic Seaport)
Salem Mass (Witch trial history)
Bar Harbor Maine (eating lobster by the water at a lobster
pound)
Freeport Maine (LL Bean)
http://www.fdr.net/home (Campobello--FDR home)
Those are what come to mind right now of neat things we saw.
Have a great trip!