In the original story, written by John Carl Buechler, none of the characters had last names, except for Jack Bergman. The screenwriters expanded on that when naming the other characters because they were fans of the comedy group The Firesign Theatre. So each member of the group of Bigfoot hunters has the same last name as one of the four members of the Firesign Theatre: Bergman, Proctor, Ossman, and Austin.
George Kennedy only worked for three days on this film, and he stipulated that he wouldn't appear in this movie unless his daughter Shannon Kennedy was cast in a small role.
Shot in twelve days.
Filmed at the same cabin location as Friday The 13th: The Final Chapter
George Kennedy was paid fifteen thousand dollars for his work in the film.