Hi RR,
I had a yacht in Cullen Bay M back in 2011 and have some good ideas. I have to go out now but will put them down this arvo.
I guess you have been to Dinah Beach. That is where the real Yachties hang out.
www.dinahbeach.evasbackpackers.com.au/The weather maps show darwin in grips of tropical low at present.
cheers