X1 to the Walkie-Talkie suggestion. We have some great Motorola FRS radios and we LOVE them, especially for backing in to campsites. After we get settled into our site we love to just sit and watch the other couples come in. It can be quite entertaining to watch the wild hand signals by the wife as her husband tries to back in. Finally he gets frustrated and rolls down his window and yells: "I can't SEE you!!!" :) I'm always tempted to take my set of two-way radios over to them, but by that time they're usually not in a visiting mood. Haha!
