Don't get too much stuff - you'll be surprised what you can "make do" with. Do they have fuel Jerries? Must Have! We did 2 months in June and July - and we needed extra fuel sometimes. Then you aren't always a slave to the fuel pump. (2 Kiwis, 2 kids and a caravan)
We have bought from all three (Rays, Anaconda, and Aussie Disposals). Don't buy full price from ANYONE! They all match. And they all have ridiculous sales.
We have a shop nearby us called VanCruiser and they have an online store too. They are always very reasonable as they seem to always sell at online prices. Plus they have a bricks and mortar store - so you can see, touch, try stuff too.