For anyone in the area of the Stampede (total attendance is supposed to be around 150,000 this year) I found the following channels in use last night.
Mututal Aid Calling- repeater linked to the KHP Pottawatomie Tower
Mutual Aid Tac 2- repeated law enforcment operations (heard Pott SO and Alcohol Beverage Control units)
868.83750 KHP Troop B Talk-Around- simplex low power KHP patrol teams in the campgrounds (sounded like 5 or six man teams).
I will be back over tonight and try to get some more information. Mutual Aid Tac 1 was also being used but was covered by the busier Tac 2 most of the time and I didn't get a feel for what they were using it for.