We used CB's for years with upgrades for more distance. I still have a 25 watt one in my CJ8 rock crawler as it is still the quick and dirty answer to communications on the trail. There's the rub: on the trail. I see absolutely no use for it on the highway or in big cities. With some truckers pumping out a zillion watts that cover every channel, it's no use. We've been thru a couple sets of FRS radios, and they keep getting better and better with a longer range. We've used these on family camping trips to great advantage, as long as you are within sightline and only a couple miles away. By far, the most big-time communication device for travelers is a Hamm radio. Everyone in my old informal jeep club, "The Beater Boys", had Hamm radios....except me. If you don't use it much it may not be a good solution. On the other hand, come the Armageddon, if electronics are still working at all, a Hamm radio will be invaluable.
Of course, cell phones are generally worthless wherever we go in the outback with only a sometimes and sketchy signal. I always get a laugh out of our city slicker friends who are horrified to find they can't play their on-line games on 4G or read their email.
jefe