A self-drive vacation in New Zealand will give you the freedom to choose where you go. However, New Zealand's roads are quite dangerous. There's a large rural network of roads, and not many motorways. If you are not used to driving on the left, or familiar with NZ's road signs, you can be a danger to other road users.
This quick guide gives you the basics of what you need to know to drive on New Zealand's roads. Then once you've digested it, try the quick road code tests at http://www.drivingtests.co.nz to check you're fully up-to-speed for your holiday.