a XT660 is fine on Stockton (provided you've got a pass).

http://www.youtube.com/watch?v=aP6WDp7GFok

notice at 0:13 it even looks to have standard tyres???

Maybe a blip along Mungo Brush beach instead?

Stroud Pub for lunch (best mixed grill going) or National Motor Cycle Museum then Nabiac Hotel (cheapest meal in area) decisions, decisions.

Via Markwell it is pretty easy to do a round trip well into Barrington Tops in a day.... or up to Elands to the Waterfall!

Your right though, what to include and what to exclude.

I am thinking that October is too soon, Australia Day maybe a better option. And then I am open to how it is to be ran.

Option A [The Tight A*se Way]: Everyone turns up, fends for them self, talks cow manure, rides, more talk, goes home.
No cost.

Option B [The Win Win]: Everyone turns up saturday; some tents provided (I think last count I've got about 3 big ones (you bring your own sleeping bag), probably could get a lend of a big central one as well), a basic meal saturday night, ride all sunday, sweeper ute provided to collect broken ones (just in case), BBQ Sunday night with a keg some sort of prize draw, party to wee hours, breakfast Monday everyone departs. Do you want a polo shirt to remember it by?
Cost: Depending on numbers, but about $100 should cover it.

Option C [The Government Way]: We fly "Gas_Up_Lets_Go" out to Australia, we pay him a massive consultancy fee, everything is organized down to the last detail we spend a weekend together and spend the next 3 years paying it off.
Cost: $10,000 per person, minimum 127

Talk to me, these things just don't magically occur.