(I was planning on going there for Easter)
(I was planning on going there for Easter)
All of which to say you'll probably be fine and I don't imagine being a US vs NZ national will make any difference as to whether you get the stazi treatment or the wave through.
Also FWIW I'm usually a more worried about missing my flights due to unnecessary searches on the TSA side of things (combining a special breed of stupid with a dangerous type of wilful paranoia) than on the NZ side (more of your basic 'just following orders guvn'r' type of stupidity)
I remember when we visited the Philippines, a friend gave us about 20 jars of a local delicacy to take back home to New Zealand. Which was very kind, except New Zealand's biosecurity laws meant that we had to throw most of them away at the border. (We could keep the few that were sealed properly.)