I’ve been to Gettysburg a couple of times in my life, but not when they had reenactments. Kings Mountain has a living-history event in a couple of weeks; it’s just getting warm enough for the reenactors to enjoy camping out.
We went to several historic sites in VA when we lived there, and it was pretty cool, because my son had been learning about the Civil War just before we moved. There is so much to see, there!