Parking is very limited at the lighthouse. you could park at one of the public beach lots.you also have to pay to enter the side of the island where the lighthouse is
Honey Bun has your best suggestion.
You will have a tough time with motorhome st the lighthouse. I would park MH and drive crv .
RV parking is not available at the light house or any of the nearby parking areas. There are RV areas but you will have to check with the welcome center or the visitor's bureau. To tour the actual light house, there's a fee.
Are you staying in your RV while you're on Hilton Head? There are only two motorcoach resorts on island and to travel to the lighthouse from either is simple as paying your gate fee to enter Sea Pines and follow the signs to Harbor Towne.
There are several large lots as well, with shuttle service to Harbor town. Those lots are larger and should be easy you navigate.
Wall Mart?
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