Well, if you recall, the "fallout shelters" in the 50's and 60's had Gonsett Communicators. These were 5 watt 2-meter AM radios, which means they had the relative power of a modern Baofeng FM handheld, which you can get for $20 on Amazon. They'll get you about 5 to 10 miles, radio to radio, depending upon terrain and your antenna. That said, don't underestimate the value of being able to pull in communications from elsewhere, as well as being able to send messages "out of state", as it were. Some disasters are local and some are regional. For example, an Earthquake might affect a very large area, and you might need to send a signal beyond 20 miles to get help. And yes, I'm a ham radio guy.