Tickets go on sale tomorrow via ProTicket and the Muswellbrook Shire Council admin centre during office hours.
http://www.proticket.com.au/event.asp?eventid=878
http://www.muswellbrook.nsw.gov.au/Things-to-do/958-exp280211.htm
Now, I can tell you, I would advise taking a bus to Olympic Park, there is SFA space for parking anywhere near the venue and it sounds like they are not letting anyone bar the disabled and known VIPs. Take up the option of the shuttle bus going to and from the Showground, at least you can wait at Maccas while everyone else tries to get out.
Train is not really advisable, as the Scone branch of the Hunter line has no trains going back to Newcastle after 8.00pm. If you have overnight accommodation in Muswellbrook, then either the Countrylink or arvo CityRail train is a goer, it stops at Muswellbrook and is not far away from the grounds.
---------- Post added at 07:59 PM ---------- Previous post was at 07:55 PM ----------
I laughed at this bit...
OK...where the hell in Muswellbrook can you have a secret function?