This one is located in Battery Road, down at Williamstown, Victoria. Specifically, you have to go by Morris St. from the center of the town towards Battery road, then you’ll have to take a right turn just at the Williamstown Cricket Ground, this way, you’ll be on Battery Road, with some public toilets at your left. As the only thing there is down this road is the Point Gellibrand Park, and there are no houses nor buildings whatsoever (just the cricket ground), this place offers great privacy and seclusion. You’ll be far from any traffic and there shouldn’t be much lighting, unless the lights of the cricket ground are on, which would obviously ruin everyone’s party. The toilets are obviously a great asset, so keep them in mind both for location and for fun.