Rowany Festival
The Rowany Festival (sometimes called just "Festival") is Australia's largest SCA event. Currently, it is held at the Crossroads medieval village. Anything that people do in the SCA (well, most things) will be on display in some form or other at Rowany 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/
Religious observance
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 discrete 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.
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 three different locations - Fairholme Park in Wilton, Tara Girl Guide camp in Silverdale, or the Crossroads site near Yass.