I'm currently planning a road trip in March covering the following states:
Texas -> New Mexico -> Arizona -> California -> Nevada -> Utah -> New Mexico -> Texas

All of these states except California honor the Texas Handgun License for concealed carry. I'll be complying with California law when entering and traveling within that state (firearm unloaded in the trunk, firearm and ammo in separate inaccessible containers in the trunk, will be carrying a M&P Shield and a Smith 642 so no concerns over magazine capacity, so forth).

Will be studying up on the carry laws in New Mexico, Arizona, Nevada, and Utah so to be fully compliant during travels. Several of these states support large tribal reservations, particularly Navajo tribal land, and I'll be visiting Monument Valley and Canyon de Chelly National Monument on my return trip. I'll need to find out if I can legally carry on foot within reservation land to know whether I can carry in Canyon de Chelly.

Does anyone have any knowledge of tribal policies and laws towards concealed carry in the Northwest, especially as reservations are technically sovereign territory. I'll be studying up on the Navajo and Hopi reservations of the Four Corners area specifically but wondering if anyone on the forum has experience with any of the tribal laws or policies in the Great Northwet.

Depends on the tribe, the state, compacts in place, and whether the tribal police are cross deputized.
And whether the tribal police are up on current state laws, and their authority towards non tribal members.
They mostly deal with tribal law, which can be some crazy shit on its own.
I'd check this out.
http://www.handgunlaw.us/documents/tribal_law_ccw.pdf

As for my experiences in WA, no problems.
Buddy had a Tulalip security guard tell him he could be arrested for carrying a gun in their casino as it was posted.
They argued for a bit and the guard said "OK, we can't arrest you. But we'll take your picture and you can never come back again!.

Good luck.

Tribal lands do not have to obey state ccw laws from what I was told by an ex-leo/lawyer friend. So check this out carefully..

Thanks guys your feedback is confirming what I'm discovering online as well. Basically tribal policy is a crap shoot depending on many factors and varying from tribe to tribe. I'm quickly reaching the conclusion that I will NOT carry a concealed pistol on foot in Navajo tribal lands including Canyon de Chelly National Monument or anywhere else near the Four Corners area.

As to vehicular travel on the rez, basically in various threads the conclusions are all over the place with some people recommending to store firearms in compliance with FOPA (unloaded & inaccessible in trunk) while traversing tribal land and others indicating that traversing tribal reservations while carrying concealed in your personal vehicle on a state maintained highway is acceptable. Note that a lot of the folks saying it's OK to pack in your car on a state maintained highway also recommend against speeding so as to avoid any possibility of LEO interaction.

Several posters also note that Navajo tribal police have been known to confiscate loaded firearms found in personal vehicles, even under the auspices of a concealed carry permit and that the owner must show proof of ownership (sales receipt) to reclaim the firearm at a later date at tribal police headquarters. Major PITA.

I may call the Navajo Nation for clarification but I expect that this will be a lot like calling the IRS for tax advice There's basically no guarantee that the advice offered by the person answering the phone will be in any way similar to how a Reservation LEO may interpret the law or even how any two Reservation LEO's may interpret the law.

I'm a member of Texas Law Shield which is a member of US Law Shield and will give them a ring for legal consultation prior to setting out.

good luck. let us know what you find out, hope fully not the hard way.

Tribal laws only applies to tribal members. If they are cross deputized and you are a non tribal member they have to follow state law. Worst case is they can hold you i believe 3 hours to transfer you to sheriff custody. (If you broke state law.) So if state law says you can carry a gun and tribal law says different then worst case the tribe can do is hold you 3 hours and tell you not to come back.

Oliphant v. Suquamish Indian Tribe