We are leaving Saturday to arrive on Monday, we looked at getting the super ensuite but it was already taken
Crystalyn
We had to book the Super Ensuite when we left to come home in September 2011 just to get it. Where are you staying on the way up? We are staying at the Adventure Whitsunday Big 4 in Airlie Beach Again. Love that park, we stop there whenever we can.
For the uninitatied on all things "far" north is there any special reason for September?
I am going up in July to Cairns Coconut and Airlie Beach big 4 so fingers crossed I got the seasons right

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Hey expanda! We go in September for no other reason than the fact that it is school holidays and I have 2 kids. Having said that, I have a mate who lives in Cairns and he reckons the weather in September is generally perfect. Not too hot, generally not too wet and normally light winds so we can go fishing out wide. I did a 4x4 trip to Cape York last year, I left mid June and came back mid July. This is the best time of the year right up there, anything north of Cooktown is still well over 30 degrees through the day, although remaining pleasant at night for camping. This is also the dry season so "generally" all the tracks are open and your holiday is not spoiled by days of driving rain. I think anything July to October in Cairns would be great.
Going from Rocky to Cairns in July, it is still a bit cold for me in the swimming pools - even in September I was reluctant to get in up at Cairns and Airlie was too cold. Having said that, the kids swam everywhere and loved it. Depends what you are used to I suppose.
You will also love both Big 4 Parks. The first time we went, we arrived at the Adventure Whitsunday Airlie Beach and did not want to leave. The kids had a ball and it was just a really well laid out awesome park. Then we got to Cairns and thought, this is even better! Cairns Coconut is bigger, it has a "restaurant", a convenience Shop and 2 x Fuel pumps. The kids loved the adventure water park, but personally I reckon the 30m pool and slides in Airlie was a better set up. Either way, both parks are way above average and you will have a ball. If it is available, I can also recommend the Super Ensuite Site in Cairns. If for nothing else, having your own private Washing Machine and Clothes Dryer made the difference for us.
See ya!