I set up my channels in separate radio zones by creating Regions i.e. Arizona East, Arizona South, Arizona West, Arizona Phoenix and I do the same thing for California, Nevada, New Mexico Texas, and Utah. The regions will be grouped together within a State group. When I am traveling in that particular region, I switch my radio to that Region zone for the channels in that Region. If I am traveling to or in other states that I didn't list, I will create a different codeplug file for those States accordingly. My radios are programmed with almost 40 separate zones. Some Regions will have anywhere from about 20 to almost 40 channels programmed for the respective Region.