Oh man, Kiwi your killing me. NZ is known for the great fishing, especally brown trout. Leave that scuba gear alone, buy a cheap flyrod, get a quikie lesson, just enough to learn how to cast and go have some fun. Sounds like you have a very unique opportunity, one that guys like me would die for. Maby I should just come over there and lend you a rod and give you a few lesson,s....you'll be hooked. ( pun intended )