Steven Amos feels hopeful for once. He’s finishing a drug and alcohol treatment program, living in a halfway house, and working a new job, doing carpentry. “I love anything outdoors,” he said. “I’m happy I’m not locked up.” A member of the Northern Arapaho Tribe, Amos, age 53, grew up with the snow-capped Rocky Mountains set like a painting behind his childhood home in Ethete, Wyoming…