This has been discussed to death. Here are the facts:
No county or city code can pre-empt your right to carry. Many are worried about getting into trouble. I myself and many friends have carried in NLV with zero issues, and cops there do not care. That local ordnance was put into effect so cops can shake down s*hitbags. They wont mess with you if you're not up to no good. Technically they could cite you, but in the end you'd win.
Secondly someone mentioned no ccw in casinos. That's a lie. You can carry in casinos. IF they find your gun (which means you're an idiot) they can ask you to leave, that is all.