that time of the year = crazy wind
Shark bay; denham is good, nanga bay is good at low tide, DONT KITE LITTLE LAGOON! (i did but apparently that was stupid due to the high stone fish numbers or something insignificant like that

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Exmouth is great, search it in other threads, basically Graveyards = learning waves (though maybe not in dec jan) and sandy bay = top notch flats, dont kite turquoise bay, looks good but a snorkel beach, not gonna make any friends kiting there.
Coral bay, go there to meet backpackers, have fun and spend lots of money on food, dont bother with the kites, the rangers or locals or tourists will have a go at you for kiting anywhere other that the water ski area (dodgy) or Mauds landing
bring a 4wd and explore, look at google earth and you will see lots of great little areas.