Imagine this, it's two weeks after the SHTF and you running low on AAs and there isn't a D cell around for 200 miles without a paranoid trigger finger between you and it. Your Maglite is dead, your comms radios are about to be done, and smoke signals draw too much attention. If you haven't thought about this before, then how about now?
The mobile radio is a tried and true method for communications in the field. Modern technology has increased range and clarity while also allowing for add-ons like voice scrambling. The FCC regulates and licenses some of the more "prime" radio frequencies, but with the demise of UHF Analog Television Broadcast, there are now other frequencies that are available.
There are many reasons to plant a hedge row instead of building a fence such as:
How do you communicate privately? This is a problem that has plagued mankind for centuries and has entered a new era of need with the advent of texting, instant messaging and mobile phones. For all intents and purposes, all of that data is currently transmitted in the clear. Government servers get split feeds direct from the phone company. Texting is not even encrypted at all and law enforcement can get transcripts of messages. So how does the average person protect themselves and exercise their right to privacy?