Thanks to the hard work of Ryan and Craig, NZLARPS now has a proper web site. 
www.nzlarps.org.
It has all the answers to all your questions (and if not, who to contact to get the answers) not to mention the details on the society, what a project is, what an associate is, who are our current associates are, how to join etc.
So check it out, get your friends, get your neighbours, and hey why not get everyone you know to have a look. 
I wonder if a press release about NZLARPS would be a good idea, now that there’s a website for people to come to for more information?
I’m no media expert, but as I understand it you just write up a description of the society for the general public, and send it out to relevant news outlets. Newspapers, TV channels, etc. And then be ready to field interviews etc. if they take an interest.
We could also consider a more hobby-insider release to go to places like rpg.net, nzrag.com, larplist.com, etc.