Ole Hickory BBQ is the best in Charlotte!!!! They still use hickory wood and not gas to cook and you can see the meat cooking from within the restaurant.
Not to be disrespectful to our guest, but I don't care for Old Hickory at all. It's not NC style BBQ, as they slather it with a thick red sauce that belies the owner's Georgia roots. There is something about the flavor and texture of the meat that puts me off, as well.
It's up near the University, which may be well out of the way if you are heading downtown.
A new place that opened in the past few months on South Boulevard is worth checking out. It's called Mack's and while their BBQ is not exactly NC style, either, it is very good. They also have a great beer selection, so if you like craft beer, you can get something good to drink, as well.