Roger Mooking takes a trip to Charleston, S.C., to visit the Big Red Rig, a bright red, double-decker, thirty-foot trailer tricked out with two massive smokers cooking traditional pulled pork, ribs and chicken for barbecue competitions across the country. Then, Bone-in Artisan BBQ in Columbia, S.C., is a hugely popular food truck pushing the limits on taste and technique, as well as the definition of South Carolina-style barbecue.