Nevada law is silent on carrying firearms in vehicles. Any citizen who can own a firearm may carry it
their vehicle. There is no way for the average citizen to get an official answer to this question. Do be advised
that local governments may have regulations against carry in a vehicle without a permit. North Las Vegas
and Bolder City are two cities that have such laws. There could be more. Use extreme caution.
To be on the safe side I called the Clark County Sheriff's department to verify what I had read. I was told that a handgun can be carried in a vehicle, loaded, as long as it is not concealed. When I pressed them as to what this means (i.e. if it's in the glove box is it "concealed") I was told that if it is in a bag or purse (or something like) it is considered concealed (this includes a soft, zipper case). But if it is holstered in the glove box or the center console, it is not considered concealed. However, if I wanted to leave it unholstered and lying on the seat or floorboard, that's perfectly alright.
I was also instructed to contact the local PD of the city where I am going to be staying to see if that city has any special restrictions, such as North Las Vegas and Bolder City. I asked how cities could have special restrictions, since Nevada passed a preemption law in 2007, and was told that they were grandfathered in, they are still enforceable until revoked. (North Las Vegas requires your handgun to be in a case in the trunk, and Bolder City requires the firearm unloaded, cased, and stored separately from any ammunition). (I looked for information online and found this at Gun Owners of Nevada http://www.gonv.org/ccw.htm
So, I called the Henderson PD to see if they had special restrictions, which they do not. The only thing that I was cautioned to do was make sure my firearm is not "wrapped up in a cloth, or anything that could give the impression that [I] am intentionally trying to conceal the weapon."
So, there you go. Hopefully this will be helpful to anyone else who is traveling to/through Clark County, Nevada. Hopefully we'll just get reciprocity (or at least recognition) back so that we won't have to deal with this jumbled mess of laws.