The strip at Cloudbreaks certainly wide enough for an A320 but there would need to be some strengthening of the pavement to handle the weight of them. I'm not sure TODR etc..
The pavement struggles in the heat with F100's at a weight of around 40 tonnes. An A320 is much heavier than that.
I'm sure they would love to bring an A380 in if they could and probably think it could be done - knowing some of the people that think they make the decisions!
VH-UFO - you'll enjoy it up there the people are pretty good. And the camp is really comfortable.