Out of the airbnb by 6am, a short drive to Wellington port, through the gates and into the line of cars, trucks and camper vans all ready to leave the shores of North Island and head south. Two hours later we’re all still here, waiting for the ship’s “technical issue” to be resolved before we can drive up the ramp and on to the Bluebridge Ferry, then, just as we are starting to fear hearing the word “cancelled”, the bollards are withdrawn and we’re on our way. The crossing is flat calm with not a wave in sight, but what really intrigues us is that for the latter two hours…