I'm in Parkton, NC. You'll pass it on 95.
Things to do in Charleston:
1. See the Yorktown (way cool)
2. Drive to Sheldon (about an hour) and go to the Old Sheldon Church ruins
3. Walk around downtown, look at galleries, go to restaurants (first time I was there it was 20 degrees, last time it was 95, so I didn't do a lot of this either time)
4. Grab a fishing charter in Mount Pleasant