Is a gps collar out of the question? I used to run beepers and they're fantastic, but the GPS is light years better IMO. The Garmin Alpha has gps, vibrate, stimulation and a low volume beeper locate button (controlled by operator, not a beep when dog is on point). NO sound but I always know where the dog is regardless of cover (advantage-hunter!). Probably the best hunting purchase I've made next to the pooch itself...