ASWA has their AstroCamp twice a year down at Dryandra. That's the largest that I know of. Astro Camp's have daytime and night time activities just like 'star parties'. It has attendance of about 40 people/20 scopes and personally I really enjoy the weekends (have been to 14 now). AGWA does have camps I think, I haven't been to one to be able to compare them personally.
The next
ASWA one is not long away, check the homepage & calendar on the home page for info. Non-members are welcome, and I'm always interested to meet up with other Ice In Space members there.
I lead the "
SDSO" section of
ASWA which travels to dark sky locations (Seriously Dark Sky Observing) on a semi-regular basis (about 6 times a year), for between 1 and 4 nights. While not a star party, it is dark sky observing with a group of people.
Edit: Swan Star Party lasted for a few years but I think the organisers (who worked very hard) were burnt out eventually with lack of additional help from others, so it ended. Personally I like the idea of a "neutral" star party, not aligned to any particular club, but I think it will take more people to get involved in the hobby and the organising within WA for it to happen again. I could be wrong.
Roger.