DVD-I used to live down in that area, just a bit above Little River, SC. I have stayed at Bucksport many times. You'll enjoy the trip down the Waccamaw-it really is a beautiful trip. Too bad your timing won't give you a day in Georgetown, it is a neat little place. We used to stop at the free dock downtown and then stay in the Belle Isle Marina overnight. You will love the trip down to Charleston. When you cross the Santee River, look for dolphin-we used to see them all the time way up the river and waterway.
Enjoy the trip!