We are planning a vacation to Newport. We have a hotel reserved for 6 nights. We are planning to see the mansions and do the cliff walk. We will go to the beach some. We have three teenagers and they like to explore. What are your recommendations for a day trip from Newport? Should we try the ferry to Block Island or Martha's Vineyard? As a family we enjoy hiking and spending time outsides. We can pass on shopping and restaurants. Also, is anyone familiar where we could rent a motor boat for 1/2 to one day? Thanks in advance.