cape may - Martha''''s Vineyard
Do you need a slip. There are moorings that are available to transients. you might need to get in around 10-11 am to find one and weekends are tough.
What about anchoring? I have been there a few times and I have anchored out every time. Never had a problem Block Island is nice and worth the stop.
There are so many places, I couldn''t list them...here are a few close to Block Island
I think Mystic is pretty cool. its got a maritime museum, etc. I like Newport also. A bit pricey, but worth a few days, etc