In case anyone is headed out on Sunday, here's what I caught on Saturday:
135.650 Air Boss
118.700 MIV Tower
123.150 Show Discrete (intra-team comms & event PA interconnect)
129.950 Warbirds Parking (little use, not 100% sure of ID)
###.### Ground Boss (was on a regular MIV channel, maybe the tower channel)
Golden Knights flight used Show Discrete to talk with the ground narrator.
Red Eagles, Billy Worth Pitts, Tim Weber, NE Raiders, & others used Show Discrete for coordination and/or interconnection with the PA.
USCG Dauphin was a single-flight so no coordination comms were needed.
F-16 demo was mostly a solo flight. I don't know what was used for coordination during the F-16/P-51 Heritage Flight.
I got a close call capture of Air 2 (medevac) transmitting on 159.255/210.7, might be repeater input, I haven't researched this any further.
I didn't seek out or stumble upon what was being used for event services. I was getting a bunch of hits on pre-reband 800 channels until I took that band out of search.