Hi Dunk,
Welcome to Ice In Space
The below map (posted by Gak) is a few years old now but it should give an idea of what you are looking for.
Quote:
Originally Posted by gak
Colours correspond to ratios between the artificial sky brightness and the natural sky brightness of: <0.01 (black), 0.01-0.11 (dark-gray), 0.11-0.33 (blue), 0.33-1 (green), 1-3 (yellow), 3-9 (orange), 9-27 (red), <27 (white).
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There are probably more around. Try to google "light pollution Sydney"
I live just west of The Entrance on the map. It is about 75 minutes north of Sydney CBD (excluding traffic peak times). Fast train = 90 minutes to CBD centre.
I get some good results in the backyard quite often.
Check the "Star Parties..." forum for some local observing sites around Sydney.
We go to Mangrove Mountain (aka: Pony Club) which is about as good as it gets within 1.5 hours of Sydney. It is South West of me (North West of Sydney). It might be ideal - But it is (very) not handy to Public Transport.
I hear there is a good spot out Katoomba way, West of Sydney, also about 90+ minutes drive from Sydney.
Hope this helps, at least as a starter for you.
Good Luck.
Keep us posted.
Hope to meet you soon.