I do not know of any openly gun friendly casino. Most Nevadans on OC NV carry open everywhere. Check out the open carry pamphlet posted on open carry org NV for the no open carry places. There is no law stopping open carrying in a casino however if it is the casinos policy they will ask you to leave if they notice the firearm. They are not required to post no guns allowed signs. Most casino security is fairly friendly when asking you to secure the gun or leave. The casinos recourse if one does not comply by securing the gun or leaving is to have the person tress passed, which is not an arrest more like a formal warring. If one was to return after being tress passed, they can then arrest which would be for not leaving when asked. If your plans are to enjoy the casinos, shows spending a lot of time inside the casinos I believe you will eventually be stopped and asked to secure the gun. If your mission is to exercise your right to carry, carry open while in the casino, realizing you may be asked to leave and come back without the gun. If you mission is to enjoy the shows and casinos activities you may want to carry concealed if Nevada recognizes your conceal permit. If I want an uninterrupted evening with my wife while in a casino I conceal going back to open carry as soon as I get back to my vehicle. Open carrying on the strip, Fremont experience is no problem. Most non-casino strip and Fremont experience business will not make an issue with open carry.