GREENVILLE, Calif. — Looking back, Bradley Bentz doesn’t know what took him so long to move out of Los Angeles County. For decades, he’d lived a short walk from the Santa Anita Park racetrack and a few minutes drive to the Rose Bowl in Pasadena. It was the typical city life. “The cars and the smog. The noise. The lights that you can’t even tell when it’s dark,” Bentz said, shaking his head as if waking up from a nightmare. “I just couldn’t do it.” So he headed to the sparsely populated mountains of Plumas County. He joined the U.S....