This is on our list for our Charleston trip next month. We're all history buffs so really looking forward to it. 
If you've toured it, can you tell me how much time to allow? I see that the tour tickets are presold for time slots every 20 minute increments, but I can't tell if that's all there is. Surely there is a visitor center connected with it, static displays, etc.
TIA for any input!

If you've toured it, can you tell me how much time to allow? I see that the tour tickets are presold for time slots every 20 minute increments, but I can't tell if that's all there is. Surely there is a visitor center connected with it, static displays, etc.
TIA for any input!