Do you equip your "backup spotter" with a walkie-talkie?

I have no idea where you all get your walkie talkies from but, we have a couple of small Motorola versions on the farm. We picked them up at Radio Shack or, maybe it was wall mart. Anyway, there is no license required and they have the range of about a mile. If your backing up from a mile away you are doing something wrong.