My father is 75 years old and has named me as his health proxy and I have legal POA in case if incapacitation. He has valid concerns about my brothers and sisters being able to reach me in case something awful happens.
How reliable are cell phone signals (hate the idea of taking one but, what can you do?) and other methods of reaching someone out on the trail? Assuming I call them once a week or so to let them know where I am and where I expect to be?