American society is not particularly tolerant of groups who choose isolation from mainstream society. Perhaps this was always the case: why were the Mormons forced to flee to Utah over 150 years ago? It is a peculiar development as several of the 13 original colonies were founded as havens for dissenters from England's religious disputes: Plymouth, Rhode Island, Pennsylvania, and Maryland.
They are affiliated with a reservation group. Start your search for these groups by looking for “peyote” ~ quite enlightening.