Charleston, SC where to stay and things to do?

Maybe a tour of Fort Sumter, There are numerous tours of the city, A haunted Jail tour, and maybe a sailing trip on the water to watch a sunset over the city, or a paddlewheeler dinner and music cruise. Day trips to Congaree National Park, Savannah (see the cemetary).and do try a "Low country boil" while you are there.
Myrtle Beach is a little touristy for my taste but there are many tourist venues there as well and a giant sky wheel you may enjoy.