The Apple Dumpling Gang (1975)

Director: Norman Tokar
Cast: Bill Bixby, David Wayne, Don Knotts, Harry Morgan, John McGiver, Slim Pickens, Susan Clark, Tim Conway

Synopsis:

A roving bachelor gets saddled with three children and a wealth of trouble when the youngsters stumble upon a huge gold nugget. They join forces with two bumbling outlaws to fend off the greedy townspeople and soon find themselves facing a surly gang of sharpshooters.