I've only ever been fishing on a boat, so I can't help you sorry.
Are you going with someone experienced? Ask them. Otherwise I would go into a sports shop like Stirling sports or somewhere that have people that know what they are talking about, talk to them, find out what you need, then go to the warehouse and buy it
Cheeky I know, I do it all the time.
Otherwise I'd try the library and finding a book on it.
How are you finding
NZ anyway?