We regularly go to Yarra Flats Picnic Ground, Ivanhoe/Bulleen. (on extension of Bell Street where it meets the Boulevard). There is already 'heaps' of male/male activity going on around the numerous trails. Never takes long to get a couple of stray bi-boys who want their dick sucked. Plenty of secluded areas/trails and sexual activity never looks out of place there.
Also the Banksia Park (at the start of Bulleen Road??? I think that's the name of the street) toilet block has a great glory hole that we have used on the odd occassion. Gives you a little bit extra security so you can lock the door strip off and wait for the dicks to come in through the 'glory hole'.
Happy hunting one and all!!!!