Kissin' Cousins (1964)

ELViS feudin' ELViS lovin' ELViS swingin'....as he joins his mountain kinfolk for a hey, hey, hayride to good ol' mountain music!

An Army officer returns to the Smoky Mountains and tries to convince his kinfolk to allow the Army to build a missile site on their land. Once he gets there, he discovers he has a look-alike cousin.