Thanks to everyone for their advice
One more question ( If I should post a new thread in another forum please let me know)- we will be entering under the Visa Waiver Program and
I have heard some horror stories about the LAX Immigration officers stopping people from enerting just becasue they don't like the look of them or for soemthing trivial like an unpaid parking fine ( can they even check that sort of thing ???)
Do immigration do some sort of computer check of Australian records ( not that I have anything to hide ) or do they just ask you questiosn about your trip ?
Do they take you aside in a seperate booth and interview you or is just walk up to a counter, answer some questions and get your passport stamped.

Having only ever traveleld internatioanlly to Fiji and Thailand I have never had to gp through a tough immigration process before and I always get nervous when I don't know what to expect - even though I know I have nothing to be nervous about it's just the way I am.

the thought of being turned away for no reason after 12 months of planning this holiday concerns me.

Any comments are greatly appreciated