cookiequeen... it really all depends on the state Govt policy on detection dogs, e.g. NSW and VIC both have ammendments to their crimes/drugs acts that allow dogs to be used to detect therefor warrant closer (much closer) inspection.
Still keen to hear if anyone has any info on the topic though. Im from Sydney and will head up on thursday too, need to know how seriously i need to think about concealing etc.
IWoody --- there are a few camping grounds around but given Australia day is just around the corner common sense leads me to belive they woulb be full. Given you are sleeping in a car you should consider secluded beach car parks etc like Labrador or out near seaworld.