G'day, Mate. You can clear out of Mardsen Cove Marina, next to the
Oil Refinery, in Whangarei and then there is Opua. If you start to get close to your July 6th date, just
work closely with
Customs and Immigration (they act as one agency in Whangarei and Opua). I have yet to hear of anyone who was forced to leave on a specific date when severe
weather was either impacting or about to impact someone's departure. Safe travels. Cheers