@Andrew *****
I went on air nz. Their check in counters are now automated kios that you scan your passport to get your boarding passes. Major changes compared to a year prior. There are assistants floating around to help if get stuck. Then someone at the luggage counter to weight and tag your bags. For someone with carry on only luggage, they would likely skip and human interaction before reaching security. Other airline counters were the same old manual style check in so more chance being asked questions there. For peace and mind though, the onward ticket site is a cheap just in case. Be sure to buy one of those no more than 24 hours before the flight since they are only valid for maybe a couple of days. The website will tell you the amount of time.