The entire crew was primarily made up of stunt people.
The cave was shot in 5 different locations to to give the depth and diversity needed to tell the story.
Kiara Finn did all stunts but one, and that was due to her needing to get into a different wardrobe with the sun going down. Her brother Kai Finn doubled her on a motorcycle.
Don Shanks character's name is Sheriff Leigh Brackett, however in the Halloween franchise there is also a character named Sheriff Leigh Brackett. Don Shanks appeared in the fifth entry of the series, Halloween 5: The Revenge of Michael Myers as Michael Myers.