Donald, Daisy and Kids: well after thinking long and hard we have finally decided to archive this cache as there is another one placed nearby (higher and drier, out of the flood range at the start of the waddle) and the area has also changed considerably since the floods last year.
Such a shame that it was confirmed that the cache actually survived the floods, and was still in its original location :'( but was obviously removed by Bundaberg council either during or shortly after their restoration works to GZ.
At least it will free up the area if someone else wants to place another cache there.