Hi
I often head to Kinglake to a members house to image, and skies there are dark enough to not need an LP filter. It's to the east of course but is only 45 mins away so is my fav spot. So you don't really need to go too far always.
This was taken from there with no LP filter.
http://www.iceinspace.com.au/forum/s...d.php?t=104489
As others mentioned, SV has some really dark skies, heathcote of course if you're an ASV member, the Otways are amazing if you wanted to camp out, mornington peninsula ast.society's site is also dark and have open nights.
If you're looking for places with accommodation, you'd have to remember they might have their lights on through the night and that can be a nuisance.
Alistair