You have lots of good ideas, info, and potential itineraries in this thread. Having spent many years in the South/Southeast, and having done tons of roadtrips (it sounds like you have as well), the one thing I'll add is that I'd limit it to 3 places (maybe 4) over the course of 10 days. Not a lot of time, and if you try to see more than that then you will end up spending most of your time in the car and not actually experiencing the destinations. Some sites, especially battlefields, can be done very quickly, but I would certainly recommend at least two days in any city and town listed above. Especially true in the coastal cities, which have so much history, such as Charleston, Savanah, etc.