So if you happened to go missing, and you were lying injured on a cold frosty hillside, would you expect the emergency services to go looking for you?
Where do they start, at the departure airfield and look 5 miles either side of a track that could be 200m long that they have no idea of direction I am taking. I would expect to receive all the services required if it happens and some good soul spots the accident and has a mobile same as whichever ground station I am working/listening to and I yell over the radio will let the world know I need help, just as I would if I fell off a push bike. If booking out gives some, a cosy warm feeling that all of the air traffic services are waiting to hit the crash alarm as soon as they are in trouble so be it, I live in the real world of known risk, and act accordingly.