There are places in arizona as well who dont change their clocks. The whole state doesn't change. However, I'm not sure if any of the Indian reservations do, doubtful.
However, I'm not sure if any of the Indian reservations do, doubtful. The Navajo Reservation does. I'm not aware of any other tribes that do.
I'm sure the Hopis don't simply because they don't like Navajos. :^P