this might be a bit far off to travel to, but i a mate of mine has a property up at marlo, GREAT place to go herping, well, from my experience it was, found heaps of monitors and elapids. went every day,never got dissapointed!
went for a walk through pipemakers park yesterday didnt come across anything... but on an other occasion i found a few skinks not to sure what species.
Considering your from Paco, go to the nature reserves near by, craigiburn grasslands although I am not sure your allowed to entre that area. Try the Merri Merri, and if you wat to go further, Kinglake and Mount Dissapointment use to be good, but the fires might have depleted the population.
Mallacoota is great...lots of tigers,lace monitors, water dragons etc etc fair drive to get there though...and most of the best spots you will need a boat to get to
You could try Woodlands Historic Park near Melbourne Airport, never gone herping there only driven past, but is a big area and there's sure to be somethin there.