reserved two nights at Edgartown for Memorial Day weekend. When the weather forecast worsened we shortened the stay to one night. 2nd night payment was forfeited due to Edgartown refund policy. They charge one night penalty for any change to reservation. Since we went early in season and harbor was scarcerly occupied I should have reserved one night at a time. That would have maintained flexibility to change plans without loss of one night's fee. Unfortunately, the cancellation policy for Dockwa for Edgartown would not come up on iphone app. Pressing button for cancellation policy info got no response. If their cancellation policy displayed I would have known better how to plan the reservation.