Why not go to the Qld Astrofest, during the August New Moon. It's a dark site, plenty of other IIS members going, plenty of room for caravans, imaging area, heck you can even get meals cooked for you if you want. It's within your desired distance.
http://www.qldastrofest.org.au
Here is the map
http://www.qldastrofest.org.au/index...-getting-there
Google maps says it's 127kms West of you, so a drive of less than two hours.
There is a cost.