Two buddies, Roger (Peter Fonda) and Frank (Warren Oates), who work at a motorcycle dealership go on vacation together with their wives, Alice (Loretta Swit) and Kelly (Lara Parker of DARK SHADOWS) in a big RV. However, they camp too closely to a satanic group who kill a human sacrifice and are relentlessly chased by the coven.
It's all very over-the-top and the followers seem psychotic. They flee to the nearby town and the sheriff doesn't believe them. Too bad they haven't thought too much about where those people in the coven come from because they begin showing up in that town. When I saw this as a kid this was a creepy movie with one of those depressing, 70's movie endings (like SOYLENT GREEN). However, it does not hold up over time so it was a disappointing trip down memory lane.