A helicopter crashed late yesterday morning while rounding up horses in the park. Superintendent Valerie Naylor reported that the two people aboard were believed to have escaped with only minor injuries. She identified them as the pilot, Ted McBride, who's with El Aero Service of Elko, Nevada, and park biologist Mike Oehler. The helicopter, which is used to herd the horses into corrals, appeared to hover over the corral, then the propeller hit the corral and broke off. Naylor told a reporter that she believed McBride and Oehler got out of the helicopter on their own after the crash.