Hi, I don't know if this will be helpful, but I found on allnurses.com a journal "Accident and Emergency Nursing," and I wondered if it would have, in the classifieds perhaps (if it carries those), info about New Zealand, as to contacts. I know you want personal experience/viewpoints, but perhaps the journal would give you some leads as to folks who could help, in addition to the nurses here.
Here's a quote from the Web page for the journal https://allnurses.com/jump.cgi?ID=1752
that mentions New Zealand, which is why I thought of you, having seen your post earlier today:
"Members of the Emergency Nurses' Section (New Zealand) and the Queensland Emergency Nurses' Association are eligible for a reduced subscription rate to Accident & Emergency Nursing. Please visit the Subscribe page for further details."
I don't know if the "Emergency Nurses' Section" would be a helpful contact.
You might already know about any or all of the above, but just in case, I thought I'd mention it to you.