Info relayed via Brendon who was there yesterday - Hard grass, rocky base (low/no mud) but there could be some limited sealed area available in the area near the drag pits. So sounds like grassy, but not a dustbowl, similar to All Ford Day, Geelong...
(excuse the cars!)
Pit area in front of hangars in centre of frame:
The area over the rear wheel of this car will be the S&S area for around 100 cars: