If you all don't have a WWII-VietNam era walkie-talkie and a CB radio, you're just not paying attention to the game. One push of a button by the wrong piece of trash and your neat little cellphone is an expensive paperweight that will keep your napkin from blowing away out on the picnic table.
As for CB, I prefer the SSB type. The range can't be beat for the money.
Hunter