Need a perfect Halloween movie? Look none other than The Wicker Man. Not the remake but the 1973 British original. It's not scary in the traditional sense, there's not really any blood or gore, but it does seem more Stephen King than Wes Craven.
The movie stars a police officer looking for a missing girl. He goes to a remote Scottish island in search for her. It's so remote that he's the only police officer there. He also doesn't even live there. De-facto island anarchy really.
He soon discovers that the island is full of weirdos. The island is actually purely pagan, and it sharply contrasts with his Christian faith. But he must act quickly if he's suppose to save the lost girl.
Christopher Lee also plays an awesome role as the religious head of the island. It's a movie full of mystery and shocking truths. A must watch.