It was Donald's exploits in Australia in 1963 / 64 that first got me hooked on record breaking (although I was also aware of the 1960 attempt at Bonneville). I do hope that the 50th anniversary - on 17th July 2014 - of the successful LSR attempt at 403.1 mph does not get overlooked. Not sure where you are based, but Blubeird CN7 is on exhibition at The National Motor Museum at Beaulieu here in the UK.
As to contacting Australian personnel, you would probably find it worthwhile to read through the books and publications surrounding the project, especially John Pearson's "Bluebird and the Dead Lake". BP were involved heavily up to the end of 1963 and then the Australian firm Ampol. Dunlop stayed with the project and their representative - Andrew Mustard - was with Donald for a considerable part of that time. He retired to Australia and had used his own Elfin single-seater (which still exists in an Australian collection) for tyre and track testing. Sadly, and now as with many of the others associated with the project, he passed away some years ago. The track that Donald used was located on the sheep station of Elliot Price and his family may be able to provide some more local insight into that period. I have attached a link to the Conservation Area that bears his name. The Australian Army had a significant involvement in track and access road preparation in both years.http://en.wikipedia.org/wiki/Lake_Eyre_National_Park
At slight personal risk (don't ask!) I will also mention that the project was loaned four Lightburn Zeta cars (Australian made but with links to the British Turner sports car)for use by the team and the camera crew making the documentary "Project Bluebird" for Dunlop. Footage from this was also included in Donald's own film "How Long a Mile?" BP, having left the project, also made a film called "Muloorina" which was about the sheep station and its harsh environment rather than specifically about the Campbell LSR attempt.
Apart from that, I think some research amongst the publications and books on Donald Campbell may provide appropraite leads. Do keep this Forum informed of progress!