We are going to spend a week in Hilton Head in June. We have been there before but with young children. Now we are going as two adults. Besides beach, bikes, tennis and eating what other activities would you recommend? We are pretty active people and like to explore. I know Savannah is close enough for a day trip but we have been there before. Are there any other cities close enough to explore? Any hiking nearby? We are getting nervous about a full week of just sitting on the beach.