Emily Harris follows the effort to bring back bighorn sheep, Valerie Harms keeps field notes from four days on the High Plains, and Montana enters a new drone era. Corinne Garcia finds the secret is out in Bozeman, and Joseph Shelton tracks spirits and ghosts in the last best place. Also inside: the Gal section, five great mobile apps for the outdoors, Phil Knight at the Museum of Mountain Flying, Chef Jim Gray’s pumpkin-ginger tart, Bill Muhlenfeld on buyer’s remorse, and Montana’s population in 30 years.