Transfer by car.
You can download (dutch) maps to the harbours here: (click on the relevant harbour for the map)
Almeerderzand, Amsterdam, Den Oever, Enkhuizen, Edam, Elburg, Franeker, Harlingen, Hoorn, Kampen, Lelystad, Lemmer, Makkum, Medemblik, Monnickendam, Muiden, Stavoren, Volendam, Urk
Tip: If you are arriving in several cars, forward this map to your fellow travellers.
It is advisable to provide the bus company with the name and mooring place of the ship, and the phone number of Naupar.