We will be staying at Cottages by the Sea in Fredericksted. I was wondering if we really need a car. We need to load up on groceries at some point, but most of our time will be spent diving and relaxing. Would it be better to just get a taxi for the grocery trip, or maybe just rent a car for a day or to? It doesn't seem like it would be worth it to rent a car for the whole week. Any suggestions?