Been a ham for a long time. Ham Radio is a very useful addition to other forms of communication. I did search and rescue in Maine when there was not much money for com gear and the ham community was a great resource.
Now I play with satellites from my truck, sending messages to friends back in Maine while we travel. (check my web site for details) Can't say enough good things about it.
It does provide us with a reliable, useful and robust method of communication when there is no commercial option. We carry ham gear when ever we step away from the truck.
However, that said, It is not going to replace your cell phone as a convenience communications method. It also takes a great deal of training and time to become proficient at those things which make it useful during times when other methods are not available.
In short, you gotta like playing with radio to fully utilize the capacity available. Sure you can buy a walkie and use it without knowing much. But don't bet your life on it.
If you like to explore technology, I can't think of a better playground than Ham Radio.
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...........From Nomad.........Been "on the road" since '97