Mmmmm ... The first week of October in the US and the first week of April in OZ. :)
I wasn't at the early get togethers, but I bet they were much less formal in organization than DirtWeek is now. Find a place that will let you hang out and trail ride and/or ride MX and throw down a party. There are a bunch of members here on the boards from Australia. Most that I am aware of are concentrated in the Southeastern quadrant, but all parts of Australia are represented here.
I my dad actually wanted to ride and I put him down as an atendee instead of a rider. I would like to pay the extra $5 now and be assured he can ride. How do I go about this? Please email me or give me a number where I can reach you. Thank you.