We are 2 families looking at a December 2008 road trip in 2 vehicles from New Hampshire to Florida. We are considering 2 way radios for the drive down in order to communicate required stops or potential breakdowns. If we decide to use them in the parks that would be an added bonus. What features should we consider in a 2 way radio? We are looking for something inexpensive, yet dependable. Any suggestions greatly appreciated. Thank you in advance... GO PATS!!!