Zane Hammond's "Magellan Observatory" in Lake Bathurst, NSW is a treat. It sports a fully-kitted observatory in a dark-sky location for both visual and astrophotographic use, and a very comfortable self-contained homestay a few hundred metres away. He leases it by the month, so a holiday of reasonable length for several people or groups can be had there, and over that period it's truly excellent value. I will testify to its quality - it got me into astronomy again after a very long hiatus. Zane is a fountain of knowledge and keeps the place in top condition.
Rating: AAA