Just google Hilton Head Bike Rentals, there are several on the island. Hilton Head Bicyle Company, AAA Riding Tigers & more. I think about $25-30 for a week. There is a bike path that runs along 278. You can get to it via a tunnel under 278. You can ride all the way to Sea Pines to the south, I've never gone any further to the north than Shelter Cove where the DVC is. I've never stayed at the DVC on HHI, do they rent bikes there?