I'm looking for suggestions for a place to keep our boat from around May 1st to around July 1st in RI. It seems that all of the slips and mooring balls are a summer season rental (6 months). I only need 2 months and don't really fancy paying for 6 months. Dry storage could be an option too as we won't be using the boat, but even that seems to be seasonal. Are there any places that offer something between daily and seasonal rates (monthly?)?