The Canberra Airport website has a map showing the final line-up of aircraft for the day in the order in which they will be displayed:
http://www.canberraairport.com.au/PDF/OpenDayMap.pdf
My understanding is that all the airline aircraft will be open for walk-through, as will the Catalina (gold coin donation I think). Not sure about the others such as DC-3 etc.
Weather permitting, it is expected that the Dragonfly will do at least one aerial display at some point during the day.