Glad to hear they'll have Pemberton's former headquarters open for tours soon. I haven't been to Vicksburg in several years, unfortunately, but the Balfour House used to be open for tours as well. I was lucky enough to get a one-person tour one time. I happened to show up right after a large group went through, and the tour guide was nice enough to take me through by myself. Emma Balfour left a diary of her experiences before and during the siege, and after reading it, I had to see her house. Assuming they still give tours, it's worth the visit.
Perry