I would think that with all of the drones and spy satelites plbs wouldn't be necesary. Why not a dedicated mt Hood drone, not only would it help SAR but they would know if someone stepped of their registered route or violated curfew.

A guy asked me why they don't use them to find and track kidnapped children - my response "Because then the tax payers would realise that they are all being watched and listened to all of the time.