Please Don't Eat the Babies (1983)

Thugs kidnap teenagers Sugar and Bobbylee in order to trace the whereabouts of a treasure they think the two girls know the secret to. The girls tell the three thugs about a visit they had made years before as children to a mysterious island with friends. There, on the island, they had encountered an old man, Jedediah, and his wife Granny. The old couple lured unsuspecting island visitors to their cabin where they would kill and eat them. Sugar and Bobbylee's friends, all but one, met this fate, and the two girls escaped, though not before discovering a cache of gold doubloons. When the three thugs return to the island with the girl, they discover that someone is still there, guarding the island and the treasure.