This was an unplanned spur of the moment cache which I placed whilst having a rest stop on the way from Bathurst back to Branxton one time.
Lacking any sort of caching preparations, I was forced to utilise an empty pringles tin and a blank notebook that I had in the car at the time; Thus the term "Largest Micro cache". Aactually it's pushing the bounds of being a "Large" cache rather than a micro.
The terrain makes plotting the exact GZ difficult, I recommend either taking a bearing from the nearest clearing and guessing your way, or read the hint for an easy solution.
Update: 04-2021
This cache is somewhat of a dinosaur now, having been in place since 2006. (15 years at the time of this update)
Thanks to all who seek it out and help maintain it!