My brother (Glen) & I will be there for sure.
If any one is looking for some reasonable accomodation there is a Big 4 Holiday Park nextdoor to where I live.
http://sydney-gateway-holiday-park.nsw.big4.com.au/. About 35km out from Petersham. Best thing is, if I recall... they have 2 pinnies in the Games Room that can occupy your time between the expo :)
Mark