Hey, Db559, this might help when you travel from CA to NV:
NV law applies to all residents and transient residents within state borders. This means you can pull over on this side of the state line, load your pistol to condition 1 if you want, and carry it concealed in your car.
You do not need a NV CCW permit to have a handgun concealed in your car.
You need to have a NV CCW permit to carry concealed on your person in NV (we have no reciprocity).
You need to have a NV CCW permit to carry a loaded handgun on your person or in your car in Clark County (Greater Las Vegas and Henderson).
You cannot have a loaded handgun, without a NV CCW, in your car or on your person, in North Las Vegas.
You cannot have a loaded rifle or shotgun anywhere in your car. NV recognizes the Taurus Judge series of pistols as revolvers, not short barreled shotguns.
You cannot have a firearm of any kind, loaded or not, concealed or not, when on Tribal Land, except if you stay on the highway on Tribal Land. This prohibition includes the Smoke Shops and the Indian Casinos and the like, and supercedes federal law.
With a CCW permit you can carry concealed in our side of Tahoe National Park and Forest, Toiyabe National Park and Forest, and Great Basin National Park, as well as all NV State Parks. Without a CCW permit you can open carry in Tahoe National Park and Forest. You cannot bring any kind of firearm into any structure located on a State or National Park (government buildings, remember?) You cannot have a gun anywhere in your car at Pyramid Lake Paiute Reservation, Walker Lake, and Lahontan Reservation Complex in Northern Nevada, it's all Tribal Land.
The only restrictions on firearms are those requiring special paperwork (full autos, registered short-barrelled rifles, sound suppressors, and destructive devices not including flame throwers), in these cases, simply have the paperwork with you at all times and do not carry them loaded. There are no restrictions on the transport, storage, manufacture, possession or transfer of flame throwers, however, you will need a burn permit before you can use them.
NV is an open carry state. With some restrictions, anyone without a CCW permit can carry a loaded firearm "clearly visible from the front". Exceptions include schools, airports, government buildings and government property, day care centers, and the like.
Owners of private property (like casinos) can post NO GUN signs, and you cannot OC in those places (it is not illegal, you will just be asked to leave). With a NV CCW permit, you can choose to ignore the signs and carry concealed in such places, but be ready to leave if they ask you to, otherwise it is trespassing and they can call the police to have you ejected and you could be charged with anything from simple trespass to criminal mischief. All misdemeanors are arrestible offenses in NV.
With a permit you can CC in casinos, churches, hospitals, malls, banks, bars, brothels, and all other "private property", just be way of NO GUNS signs.
Arizona is a Constitutional Carry State. This means that they recognize your consititutional right to have a concealed weapon. An person within their borders can carry open or concealed with or without a permit (other state's permits become irrelevant). So in this case again, you can pull over on their side of the state line, load to Condition One, and carry concealed.
The prohibition against firearms on Tribal Land applies in AZ as well.
You can carry in bars as long as there are no NO GUNS signs posted. In such cases, you MUST leave your gun in the car.
In both AZ and NV, there are no restrictions on type and number of guns and/or ammo in your car (with the exceptions mentioned above).
Hope that helps!