I've never been in Williamtown's terminal, even though we drive up to port Stephens
every year and watch a few planes on the way up and on the down at the airport,
Last JQ flight I got to sit in the cockpit, you should try getting in as well just wait till your last aboard and ask the F/A if you can get a photo, if there nice they'll ask the pilots,
it's worked for me every time.
Don't you love the engine starting sound of the A320?