Are there a lot spiders in NZ, compared to the US?
There are quite a few but during the summer months when they're breeding you're allowed to catch the adults if they're more than 12cm (five inches) wide.
In my experience it's best to warn tourists before they eat a dish with them in it because some people can be fussy when it comes to what they're used to eating. TBH it's mainly older people who have them, younger people would rather have McDonalds or something.
The whole amazing thing, recipes and all, is here.
Also, if you haven't been to Liartown recently, it's still mindblowingly good (and probably not safe for work). This is what Photoshop is for.