So, how did others go?
I turned up to the game store, after being assured that it was on, to find out that my efforts (of travel and baby-looking-after with my wife) were in vain, the guy at the desk had no idea what I was talking about. So thanks, Good Games Sydney, for sending me on that wild goose chase, and eating up a whole chunk of time on my weekend...
We had at least 4 tables go off, which is a pretty light run for us. Usually we run 6-8 tables, I was quite surprised. I am going to have to promote Red Box and Gamma World a lot more to get more players into the store. Perhaps even a raffle for a copy of the game.