I heard some stuff on ICS 2 and ICS 5 talkgroups the other day on the south zone RCS also some stuff on VHF XSD CMD 2 but on the VHF it sounded like it was a vehicle TC call one firefighter asked if it was a drill and they got a reply saying it wasn't a drill.
Also to note I found it a bit odd that they were using the 800 system considering it is a wildland fire drill and VHF is used mostly in wildland fires.