I use my handheld cb all the time when traveling. Wife and kids in the truck and I go in the rest area and radio back asking if they want anything from the vending machine. I have to remember to change off of channel 19 or I get yelled at by a truck driver though
I was looking at those garmin rhinos, I might pick up a couple frs/gmrs for bike riding and then upgrade to a rhino when my current gps gets too old.