Terran,
I imagine the Entrance has some light spill but not as much overall as a suburb so close to Sydney as mine is. The light pollution you get from a full moon destroys any great visibility for quite a distance around it. In fact - you get so much light coming off the moon (luminescence/magnitude rating at -13 ?) that I can find it in the sky without using a finder and using a 9mm eyepiece - just by navigating towards the brightening glow. I found it hard to pinpoint +6 magnitude objects even a few 'moon spans' away.
There's a large image you can download of the light pollution in Australia and you can apply it to Google Earth as a layer (it's a bit fiddly to get it to scale and lined up though). - see
http://www.iceinspace.com.au/index.p...63,404,0,0,1,0
Cheers,
Steve