This cache is a result of my attempts to try and find the elusive Hamilton Creek Caves that are supposed to exist in this area. I found a reference to these caves on the park notes for Bunyip State Park management plan (I enjoy a bit of light reading). After a bit of research I thought I knew the rough location of the caves, but after a semi-exhaustive search I gave up and decided to place some caches. I have been back to search for the caves many times again and each time I don't find them, I place a cache anyway.
Well after almost a year of research since my last outing and after talking to a few locals I felt confident that I knew where these caves were. So on a cold wet windy day, unable to do any work I turned to my wife and said, "I think I might go for a hike!"
To my utter surprise she said "I might come along with you!"
So we packed a bag and the two of us headed off this way in the wind and mud and rain. My wife doesn't have the same pace that I do when I am by myself and so We never made it to the new area that I wanted to search, but it didn't matter, we both enjoyed our time out there. Of course, I had a prepared geocache in my bag so I placed it at the point that we made it to so that you too can come out and enjoy the same walk."
There is no need to trespass on private property to reach this cache. There is only one way in and out to this cache and that is along Lupton Track. Check out the map below. You can access Lupton track from the corner of Tynong North Road and Camp Road or via Avards Track, which leaves Tynong North Road a bit further south. Please note, although the map shows three other tracks, "Weatherhead Hill Track", "Hail Track" and "Gregory Track", these run through private property and you cannot gain access via these tracks anymore.

Once at GZ there is a large ominous stump, the cache is inside this stump.
Please note that only walkers, horse riders or cyclists are allowed along this track. 4WDing and trailbikes are not allowed.
As I said I will be conducting further research and attempting to find these caves again in the future, so if you're interested in helping me, send me a message!
Do not attempt this cache on days of "extreme" or "code red" bushfire rated days and you should seriously consider leaving it alone on days rated as "severe" or even "very high".