Filmed at Spahn's Movie Ranch near Chatsworth, CA, in late 1968. The ranch was used for occasional filming of TV westerns like Bonanza (1959) and The Lone Ranger (1949), as well as for David O. Selznick's western Duel in the Sun (1946). However, with the decline of westerns in general, owner George Spahn decided to allow a group of misfit hippies to reside there temporarily in the spring of 1968 in exchange for minor upkeep of the ranch. This was shortly before filming of this movie took place. The group called themselves "The Family" and were led by Charles Manson and two of their members, Catherine Share and Bobby Beausoleil - who was later convicted of murdering a music teacher who sold mescaline to them - appear in this film.
When the "Indian" girls are bathing in the creek at the beginning of the movie, some clearly have hairy armpits while the others do not. Real Indian women wouldn't have known what a razor was back then. Also Lucy, Rick's girlfriend/wife would have had a full growth of underarm hair as well as white American women didn't start shaving under their arms till after World War I.
Italian censorship visa # 67597 delivered on 13-12-1975.