You'll get there mate. It always happens right before a big trip. Remember what happened 12months ago right before my QLD trip? Anything and everything possible went wrong and I got gastro 2 days before our departure. Things got worse with the car by the time we got to Dubbo but we made it up there, and we had an absolute ball. Can't wait to do it again.
@MB and @AB. Not sure of your sleeping arrangements when your on Fraser but I have a double swag here you are welcome to take if need be. I also have the 47L ARB fridge/ freezer here aswell. Plus a 75L Engel combi too. They are here if you want.
Might be a good idea to have a fridge each, and use one as a freezer for both families and the other just as a fridge.