You can get from Auckland to Paraparaumu for $50. From there you catch a train to Wellington (about ten bucks, one an hour) and then we can arrange to fetch you from the train station, because most of us city dwellers will be passing the train station on our way to the site.
We’d love to have you all, and still time for new PC’s to sign up and loads of time for crew.
ETA:
And there are still cheap flights direct from city to city as well!