The Rowany Festival (sometimes called just "Festival") is Australia's largest SCA event. In 2008 it changed location to the Glenworth Valley Horse Riding centre, just north of Sydney. Anything that people do in the SCA (well, most things) will be on display in some form or other at Rowany Festival.
Festival happens every Easter long weekend - don't miss it for the world.
For more info, check out the website - http://www.sca.org.au/rowany/festival/
If religious reasons are inclined to slow down your attendance at an event over Easter, don't forget that a group of Christians generally get together in a discreet place to hold a scheduled Easter Sunday mass. And if Pesach falls at the same time of year, I'm sure there will be people cooking in accordance with customs - it's actually easier to avoid leavening agents in period cooking.
(Just so people are aware -- very occasionally, when Pesach does fall during Easter, a seder is held at the festival site. Contact Del if you want to be included in this).
Camping at Rowany Festival
Hrmm... so you're coming along and don't know what to take? Perhaps you need a camping list?
The history of Rowany Festival
Rowany Festival has had five different locations - Fairholme Park in Wilton, Tara Girl Guide camp in Silverdale, and the Crossroads medieval village site near Yass. In 2008 it moved to the Glenworth Valley Horse Riding centre near Peats Ridge, New South Wales, and subsequently to Camp Wambaroo.