Been debating whether to put a CB in mine as well. A 2 meter is much better, or something similar, but I believe you need a license for it. Lots of nonsense and BS. I've been wanting to do the 2meter stuff but they make it obnoxiously complicated to get a license.
I think a CB is still good to have, especially if you don't have a better system, but it's still very limited. Another issue with CB is you have, from my experience and that of others, morons who add more power to their CBs only to get on a channel, interfere with people, and act like total a-holes.
That being said... for traveling with another or a few vehicles in relative close proximity, a CB can make the difference between having to honk the horn/blink lights to get attention/having no communication if you lose sight, and being able to quickly ask for help, give a warning, or just communicate easily.