I've looked into FM and CTCSS for CB and options are very limited. These radios - Anytone Apollo II/Stryker SR-94HPC - reportedly have an add on board.
The things to remember about prepping and comms are:
a) you need the right radio(s) to hear the news and information you need to hear
b) you need the right radio(s) to communicate with the ones you need to communicate with
CB is one option but fewer non-hobbyists have them now. Even truckers are getting away from them now that they have Waze and other GPS apps. I have noticed that the number of 18 wheelers with CB antennas on the highway is getting smaller all the time. If you and your group have them, then that is great but don't expect it to be your only source of outside information.
Being able to monitor numerous radio services - AM/FM broadcast, CB, ham, public safety, shortwave, etc - will allow you to gather up quite a bit of information when things go bad. Even during severe weather events radio can offer an insight as to what is going on in your neighborhood, town, or region.
Practice using them BEFORE an event occurs so that you are fluent in their use. Trying to figure out how to program a scanner to listen to your local police department while you are distracted with the stress of the event won't work out too well. Calling your buddy on 27.415 MHz FM for help after he loses power and has no backup power won't do you much good.
Regular use and familiarity of radio communications gear is critical.