Couple of thoughts:
- Salem, MA (Winter Island); actually a marina, right on the water (duh), within a 3 minute bike ride to the ferry that takes you into downtown Boston
- Jersey City (Liberty Harbor); close to you, another marina with a parking lot for sites, but literally located at a ferry site that takes you into NYC; views of the Statue of Liberty and a ton of bike trails to take the twins along the Hudson River.
- Bar Harbor (Acadia National Park); located in Bar Harbor, absolutely gorgeous, and great bike trails
- Outer Banks; beautiful.
- Las Vegas; oops, my bad - over 10 hours.
2008 Airstream 27FB International Ocean Breeze
2014 Ford F250 King Ranch 4X4 w/6.7L Diesel, Hensley Hitch