Davidwazza: Given the damp logbook and my inability to perform maintenance since I no longer reside in South Australia, I am archiving the cache to free up the area.
The cache was initially and cleverly hidden in a small beacon, but that was damaged/removed six months following publication, so it has since just been a simple hanging bison.
Past logs also suggest that there are two bisons at GZ. Archived cache hunters are welcome to trying their luck as I don't have the means to remove the container at the current time, thanks all.