Before coming to Australia I made a research on how it is to arrive at Sydney International Airport. There I learned that it is better not to bring anything aside from my clothing and my gadget, no food of any kind. One thing for sure, of all the immigration entry procedure in a different airport that I have been trough...they are the most strict.
The best thing is that Sydney is a walkable city and whenever I am arriving at Sydney Airport, I just walk going to the nearest next station and I save at least $14.30. Watch the video on how I do it.