Hi Helen and Pete,
Most people cruising the Kimberley will be there now, and the boats heading east usually head back to Darwin in Sept and Oct, with the aim of leaving Darwin to cross the Gulf of Carpentaria and down the east coast in Nov or early Dec, when hopefully the strong southeasterlies are easing in strength, or if your’re really lucky, change to northwesterly. You will likely catch up with boats heading east in Darwin.
All the best,
Ross