A group of young people journey to the desolate areas of Southern California to camp and investigate caves, but their intentions are swiftly disrupted by ancient creatures inhabiting those spaces. “Hillside Cannibals” (2006) is a low-budget imitation of the remake of “The Hills Have Eyes,” which came out just eighteen days prior. A character mentions "Deliverance on amphetamines," and I get what they mean, but the…