Most of Arizona is outside the light pool. Surprisingly, much of California, too. Some of my best pictures of the milky way are from South East California. Tucson and Flagstaff have both taken on light initiatives to prevent as much leakage as possible for their local observatories (Kitt Peak and Lowell). Pretty impressive!

I couldn't find my best Milky Way photos. I'm not sure where I put them :) But I have one from the rim of Hells Canyon, Idaho that I really like.