Welcome to N J Telfer Reserve where there is Bundoora Junior Football Club, Bundoora Bulls Cricket Club, Bundoora Tennis Club, Bundoora Scouts, Bundoora Pre-school not to mention a playground, off leash dog walking and also beside the power lines a walking/cycling track. When my 2 boys were quite a deal younger they were members of a few of the organizations here at various times. Take some time checking out all the activities in the reserve. A very well used reserve.
So you can expect Muggles in and around GZ most of the time especially through the various sports seasons. You will be looking for a 600ml Sistema container with a writing implement provided. GZ has a bit of cover for the intrepid geocacher but stealth will still be needed.