@Mike G are you going to be Captain Convoy of the Caravan?
In my experience with CB, it's hard for a large group to hear everyone. Some only hear transmissions from certain people and others will only hear the replies. I can lend my handheld HAM radio to the convoy leader, and I can take the tail gunner position and use the HAM in my truck. If you're not licensed, you can't broadcast, but you can still monitor. The range will cover us if (when) large gaps happen, and you should always be able to pick up my transmission (running 50W). This way the leader will know when everyone in the group has made all of the turns. And I've been to Camp Edison enough times that if we do get split up, I'm familiar with the route to camp.