Make sure that the crew clearing off have paper copies of their flight tickets as you will have to clear them off the
boat manifest at immigration and they will need proof that they are leaving the island. When you leave the island with the new crew just make sure they are listed on the crew manifest when you clear out. The choice of where to do it is Maori a matter of your flight or ferry connections, the
boat crew change should be fairly straight forward, but time consuming as you are in British islands not french