They allow open carry in NC but I wouldn't do it. It catches attention that I don't want. I do see it from time to time though. One guy was about 50 years old and gave off this vibe of, "I really don't have time to care what you think", which was perfect for open carry.
He seemed as casual about his gun as I would be about a knife in my pocket. I looked at it then made an effort to stop staring. It wasn't that big of a deal.