Nate, there is a Buckys BBQ in Ftn Inn, just south of Simpsonville and a Buckys on Roper Mtn. Road off of Woodruff Road just south of I-385. These folks compete in the SBCA events. There are a couple of other smaller joints in Greenville. There are also a couple of really good places in Spartanburg, about 30 minutes east of Greenville.
If you need a guide, just let me know.