Mental4astro - I've contacted the ASNSW, they said that they are a non-profit society and suggested that I go to a commercial society. I had a look at the society that are out there, I don't think there is one that is suitable. There are some society that are pretty close to Sydney CBD area but the sky will not be dark enough to look at it with your own naked eyes. Safety and insurance is a must, I'll have insurance regardless of where we go to.
Wavytone - Thanks for the suggestions, I will look into it.
Anyone else have other suggestions?
