Do you mean The Oaks is the last of Sydneys airports built during WW2?
Are you restoring the airport so that it can take more traffic? I have done quite a bit of flight training at THK when flying from Camden. I often found that when I got back to Camden someone had called and complained about the noise!
I always followed the circut proceedures as instructed and was only ever flying a Citabria or C-182.
Someone seems to have it in for aviation down there.