During normal business hours (8 to 4:30) you should hear a good amount of traffic on the analog talkgroups. MAPS, Road Dept, and MUA are the most active.
On the digital side COMM2 (dispatch for Sheriff and Park PD) has traffic. I've listened and didn't hear anything for over an hour at a time, then it will be busy for a bit.
Holidays, such as Thanksgiving have all the non-public safety agencies off and only a skeleton crew working for the Sheriff and Park PD.
Evenings most of the traffic is just Park PD.
George