You can setup a separate system for each county and put each on a separate scan list. Setup the Jackson Co sites in one system, Johnson Co sites in a second system, and Cass Co sites in a third system. Assign the Jackson Co talkgroups to the Jackson Co system, the Johnson Co talkgroups to the Johnson Co system, and the Cass Co talkgroups to the Cass Co system. What programming software are you using?