Noosa Enduro - advice pls

So, with the memories of finishing the weekend's race still fresh (albeit the 50km in 3:15) and the memories of the pain fading, I was thinking about another endurance type event, and the Noosa Enduro (http://www.usmevents.com.au/enduro/index.html) seems to hit the spot. With 8 training weeks to go, was even considering the 100km....

Has anyone done this event in the past? How does it compare to the Dirtworks or common Sydney rides? Would really appreciate any advice / info etc before my enthusiasm gets the better of me and I push that confirm button...

Thanks,
Tom.