I've worked as a RN with IHS for several years. At your age and I assume no experience living near an IHS facility do NOT go to a reservation hospital. Ship Rock, Rosebud, Fort Defiance are places where you work there if you grew up there or screwed up and got sent there. Check out Oklahoma hospitals only. They are far more mainstream. These hospitals are being compacted by the tribe all of the time and you may find yourself working for the tribe wich you do not want.