Quoted from Nokoro:
Any recommendations for things to do down there for a family that's never been to the city? We're thinking about a horse drawn carriage tour and a walking ghost tour at night. Would love to hear other suggestions.
I'm not going to lie, we are expecting a million visitors that weekend, so things here are going to be freaking INSANE.
Carriage tour is a must if you've never been here, ghost tours are just okay. There is a lot of history in Charleston and you will learn a lot on the carriage tour. One of the cool historic places I like downtown is the Old Exchange Building & Provost Dungeon: http://oldexchange.org
There is some fantastic food here, but you might have trouble getting reservations at this point. Some great places to eat in the area are:
Edmund's Oast, Opal, Husk, Cru Cafe, Poogan's Porch
It's the end of August, so prepare for some hot and humid weather. Beaches are nearby if you want to go sun a little bit. The aquarium here is pretty cool I think.
Check pinballmap.com for all the pins around the area as well, we have a good group here that keeps it pretty updated. Most every restaurant that has pins also has good food. Dog and Duck, Kickin' Chicken, Charleston Sports Pub, the Alley, etc... all good places.
Oh, also.... beware of lizardmen......