Yacht in Transit doesn't work in Turkey unless you are in Istanbul--the story is something like you have to pay a customs man to escort the stuff to the boat.
Bring everything with you on the plane. I was a bit nervous flying into Istanbul
as I had several duffles full of boat gear
, but everyone headed for the 'nothing to declare' line and no one cared. I watched as one guy wheeled a gigantic box through-- the outside of the box showed a kids
motorized car--and no one stopped him.