At the end of school last year I went to Isle of Palms, SC with my g/f and her family. It was a blast. Great beach, food, and about 15 min from Charleston. It's very low key and not "touristy". There was a little strip close by that had some stores and bars right on the beach for a change of atmosphere. I think it was a bit pricy but it was a great relaxing vacation. There are some other islands nearby that are pretty much the same type of thing (Sullivan's island comes to mind). Oh and we were there in early/mid may and the weather was great. Like USMC said, the outer banks are great too. My family used to frequent there when I was younger.