I am going on a 3 day trip.  Our 'guide' is suggesting to us to purchase CBs.  Not walkie talkies.   I went to the stores and all I can find it walkie talkies.  
He says to purchase a CB.  I will also have to buy an antenna for the car he said.
I'm a little confused.  Someone please clarify how CBs are better than walkie-talkies