If you are talking about the GMRS/FRS radios, we already have those radios for hunting etc. They don't seem as clear and loud as a good CB, so my Dad doesn't like using them. And we found with a long caravan of 8+ rigs communication from the back to the front won't reach even with those so called "25 mile" radios.
I'm not sure what you mean by FM Walkies, if you refer to the VHF or UHF radios, those would be great. But we have free CB's and with 8+ rigs everyone going out and purshasing $150+ radios is unlikely.
These are great alternatives, but I think I'm stuck with the CB radios with this group.