aka Valley of Evil, aka Memorial Day, aka Son of Sleepaway Camp
How bad is it? Bottom of the barrel slasher flick.
Should you see it? Not really.
There's a couple of versions of this floating around. The "Son of Sleepaway Camp" version steals some music from the original "Sleepaway Camp" and has a short hard-core porn insert. Cameron Mitchell is a real estate developer that wants to tear down an old camp. Big Bill Smith has a role. The killer is a caveman whose white underwear occasionally shows and who somehow knows how to drive a bulldozer and rewire a camper to make it explode (the one good effect in the film). There's some bikers, a dog in a well, some snakes on food at a picnic and a bear attack as a red herring. The kills are uninteresting, as are the characters. A sign early on shows it to be "Memorial Valley" and it takes place on "Memorial Day," which is an odd coincidence leading to differing titles.