I've got a place for you! My friend is starting to rent a place on West Island for up to dry-sail boats. The spot has a lockable gate around the property. A perfect harbor waterfront property for sailing. I sail my 5.0 out there all the time. You would be allowed to used the hose from the house to wash down. It is about 10 mins from New Bedford. Take a look at the maps.
N 41 35.917 W 70 50.217
Call Paul for questions. 860-666-9470