Ca Va Arnaud!
If you would like to get off the mainland and visit the last island in the south pacific before Australia, come and see Magnetic Island near Townsville!
Beautiful location, a good kite beach with a mixture of flat water and small waves, cheap accommodation right on the beach, and if there is no wind then you can snorkel, dive, bushwalk, kayak, etc. You can also bring your camper van over on a car ferry.
Townsville is also close to some very good flat-water locations.
Kite info:
http://www.tevenei.com/tvm/nellybay_kite_map.htmGeneral Island info:
www.magneticinformer.com.au/Don't worry too much about sharks and jellyfish at that time of year, although it is winter so you might want a short arm and leg wetsuit, or at least a rash vest. Careful of crocodiles if kiting near mangroves on the mainland.
Andy - Reef EcoTours Magnetic Island.