BOISE, Idaho (AP) — Wranglers in the West who have for decades cashed in on the allure of getting on a horse and setting out on an open trail say they have had to add bigger horses to their stables to help carry larger tourists over the rugged terrain. Humphrey's 10-gallon hat, goatee, black vest and spurs are a tourist favorite at Sombrero Ranches, east of Rocky Mountain National Park, where they have 20 draft horses, including Belgians and Percherons, and 25 draft horses mixes. Draft horses fell out of favor as machines took over pulling farm equipment in the mid-20th century, said Elaine Beardsley of the Ohio-based Percheron Horse Association of America. Laura Ewing of Baltimore noted that the horses back East are small and she was somewhat concerned when she arrived at Sombrero to go on a ride with her 6-year-old son, Alex. "Because I'm a little heavier I rode a larger horse," Ewing said. [...] unlike regular-sized riding horses that have seven months off after the tourist season, Little said, Percheron mixes can work most of the year, carrying elk and moose hunters into the backcountry in the fall and pulling wagons with tourists in the winter.