American Gothic (1987)

Storyline:
When six friends fly off on a weekend getaway and are suddenly plagued by engine trouble, they're forced to land on a remote island. Looking for shelter, they're grateful to encounter Ma and Pa and their children - an eccentric family living in the island's backwoods. But what begins as simple hospitality turns into a terrifying race for survival as the friends start disappearing one by one ... and turning up dead.