Cairns would probably be a good bet for that time of year.
Airfares can be had for ~$280 return (from Melb) when they're on sale, otherwise ~$450 return. Then you can either stay around Cairns and head to Yorkeys Knob for the kiting, or you can head further up the coast to Cape Tribulation (ala. Daintree Rainforest).
If i recall there was a place up there that was like backpackers accomodation price, right near a couple of great beaches, and was always populated by Euro backpackers (ala. Swedish hotties).
FWIW i'm headed up to Cairns mid-May and will be kiting for the entire week if the weather behaves itself.