"Its a VERY DEMANDING environment to fly in"
Sorry - There are MORE DEMANDING places else where in the WORLD.
Of course there are, its all beer and skittles down here in tiny tot land.
You could have the whole book of ICAO charts and fluid for Africa but it would be a waste of time because if there was freezing Fog in NZ nobody would even be able to get to the Airport. Hell, even 3 cm of snow is enough to cause chaos. What makes NZ a demanding environment is a combination of weather, facilities and the amount of remote operations that occurs here across the industry as a whole.