Here are the approximate GPS positions (exact location on the declaration form).
Some folks will sail clockwise, and others counter-clockwise.
You may sail your own course but if you want to cruise in company, say so at the briefing.

You can buy food and drink at "Booze Wijf" (North), Lunegat (SW) and at Hunzegat (SE, Zoutkamp). You may find a little chandlery at Hunzegat.