Hi Cappy,
Yep, I've kited Cooktown, IT ROCKS! Cooktown is the windiest place in Queensland and offers some unbelievably good kiting for those intrepid enough to visit.
We visited Archer Point and spent a few days there. Archer is about 15 minutes south of Cooktown. AP gets a steady 25-30 knots regularly in the winter and creates a sweet surf type wave from massive sea chop that then point breaks along a rocky point. It also has a long sandy spit running horizontal to the prevailing wind which gives you a buttery smooth run for several hundred metres.
It is a little bit croccy and has the odd Tiger Shark, being a river mouth and all, but well worth the risk. I give it 4.5-5 stars as a kiting destination. It is a little remote and you need to take in everything you need.
Good winds,