Hi Greg,
I know from experience at Sommerset Dam Park, they close the gates and want everyone out. Shelley just recently found out the same thing when she got given her orders too.
How about Lake Mogerah. A friend of mine regularly does his dark sky group tours there.
http://www.moogerah.com/
All the best on finding a good location, for me it'll be just viewing from home and yaaaaay skies are looking good at the moment!
