The first thing I usually do when I fly to Charlotte from the west coast is stop by and get some ribs. Their habanero sauce is to die for, kinda on the hotter side - but the flavor packs a punch.
And since you're here for the ribs, don't forget their BBQ pulled pork sandwich. Their potato salad complements pretty much everything on the menu, as does the slaw and greens.
In short - get extra sauce.