I can only speak to Nevada. Nevada is a safe passage state. Without a valid CCW permit you may not carry a loaded gun concealed upon your person. Open carry is not prohibited by state law but some counties and most of the larger cities have laws prohibiting it. A weapon (gun) can be carried, loaded in your auto, open or concealed as long as it is not worn on your person. Under the seat, glove box, etc. is fine. As with all advice you should check for yourself, all Nevada Sheriff's offices will be helpfull in this query. Nevada is a gun friendly state with Clark County (Las Vegas) being the least so. A Utah or Florida CCW is recognized in Nevada.