I visited the piggy park location while driving through Columbia and since that point have been a huge fan of the mustard sauce. The buffet is a little disturbing at first glance though, as most items look like vomit.
The confederate theming of the restaurant is also troubling at first glance. There are "Lincoln was wrong" post cards for sale and a lot of rebel-flag emblazoned items. If I were a black man from the north, I wouldn't have eaten there. That being said, the gift shop cashier lady was black.
(btw most "piggy park" sauce recipes on the interweb are big liars, the sauce is bright gold in color and rather sweet. If you brew up a batch from a recipe and it's sour or anything other than bright yellow, throw it out. )
That's a problem?