I found a reasonable spot on an old helipad clearing in the Royal National Park just south of Sydney. Sydney's skyglow is, of course, still pretty visible to the north but every other direction is reasonably dark and it's pretty sheltered from the wind. For me from the eastern subs it only takes just over an hour
Here it is on Google Maps:
https://maps.google.com.au/maps?q=-3...num=1&t=h&z=16
And I've attached a pano I took there last year.