William Clark Park must represent the total opposite in land size to what William Clark was known for. When he had become of age, his land worth was in the region of 1.5 Million Pounds, the richest in Australia at the time.
Be careful to avoid being seen from any direction while hunting, however finding a legal carpark nearby will probably be your greatest challenge!
Apart from that, this cache should be a quick Stop and Grab, so good luck with the Stop.
Good on Brother Colin for his early morning application, another FTF is his reward!