Sundown: The Vampire in Retreat

Sundown The Vampire in Retreat is a 1989 American Western horrorcomedy directed by Anthony Hickox and starring David Carradine, Bruce Campbell and Morgan Brittany. It was written by Hickox and John Burgess.

Under the leadership of their ancient and powerful leader Jozek Mardulak, a colony of vampires seek a peaceful life in the desolate desert town of Purgatory. Key to the transition is the towns artificialbloodmaking facility and it is just not working. Mardulak summons the human designer of the plant, who brings his wife and two young daughters along for what he thinks will be a pleasant desert vacation. Soon, he and his family are caught up in a civil war as another vampire elder, who abhors the idea of vampires being anything other than predators, organizes a revolution, and a descendant of the Van Helsing family arrives intent on destroying all vampires.

Source: Wikipedia