I really don't know anything, but think originally OzKosh / AirVenture was setup by more than just the RAA, My understanding, which could easily be flawed, was that the others jumped ship as they had little oversight and no control of expenditure, decisions etc. Similar reasons to those given by RAAus now. Did the previous AirVenture at Cessnock go well? And do you mean by ' went well' that it made money or that people had a good time? And regardless of anything else I think its a really sad outcome.