Here are some frequencies which might be used at the Avalon Airshow.

Avalon 18R/36L
Tower: 120.100
Apron: 129.300
Atis: 116.100

Avalon 18L Dep only
Tower: 118.200
Apron: 129.300
Atis: 115.100

Avalon East 17R/17L & 35L/35R
Tower: 125.400
Parking: 129.200

RAAF Roulettes use 133.9 MHz.

Also Unicom and Cagro operate on 120.100 outside tower hours.