I was at Arkaroola in Winter of 2011 on my way to Lake Eyre. Skies were pretty dark. Haven't spent any dark nights in the Flinders Ranges since 1980's but they were pretty dark back then.
Some time back I created the following light pollution overlay for Google Earth from the world light pollution survey maps.
http://joe-cali.com/astronomy/downloads/AUSTRALIAN_LIGHT_POLLUTION.kmz
Download the file (2MB) and open it with Google Earth. You'll get the Google Earth map of Australia with the world light pollution Oceania map fitted to the Australian Coastline. For residents of the seventh state
New Zealand is covered as well.
The Flinders Ranges is in the darkest zone.
I also have a similar layer for the USA for our Northern American members
http://joe-cali.com/astronomy/downloads/North_America_light_pollution.kmz
Joe