Native America Reservations/Lands
Carry on Reservations is up to the Tribe and its Ordinances/laws.
They fall outside the state laws on carrying firearms.
Even a permit/license issued by the state is not valid on Reservations unless the Tribe OK’s it.
It is very difficult to find out what their Ordinances/laws are on carrying firearms. Check with the Reservation Police/Government before carrying a firearm onto a Reservation.
Also be aware that Reservations are not marked that well and you can be well onto a Reservation before you know it.
More Info can be found at: http://www.handgunlaw.us/documents/tribal_law_ccw.pdf