In 2003 we rented a VW convertible and did the whole island trip. Very interesting. We stopped at Nachi Cocom... I think that is right and paid one fee for food/drinks/beach/pool. It was far enough from the port/pier that is was quiet and very nice.
IF you do rent, make sure to take ALL insurance provided as most credit card or US car insurance does not count with the locals and unless you have it you might find yourself in big trouble if something was to occur. Just a warning.