Does anyone know how far in advance scheduled maintenance is booked in for the attractions? I am looking at visiting the theme parks in March 2009 but would like to ensure that none of the big attactions (ie Superman, Batwing, Lethal Weapon, The Claw, Giant Drop etc.) are scheduled for annual maintenance at this time. Last time I visited The Claw at Dreamworld was down for scheduled maintenance and Lethal Weapon at Movie World had unscheduled maintenance. Living in Perth I can only afford to visit every three years or so, so it would be great if at time of booking my trip I had some idea what rides would be open (failing the unscheduled breakages etc.).