Bruin Lake Aka Hell Michigan (1970)

Our story takes place in Hell, Michigan which is actually a real town that exists in the backwoods of Michigan. A Midwestern town scientist has purposely opened a gateway to the Underworld in order to experiment on demons using pseudo-science, Biblical doctrine and six campers in the woods of Hell, Michigan. We soon discover that there is a virus spreading throughout the town that's breeding a type of werewolf creature no one has ever seen before along with supernatural forces that's about to ruin their fun filled weekend.