I did the same thing, overthought it. I had a few concerns since I was travelling solo by bike and being a girl and all. I rented an R12GS in Nov. Travelled from North to South Is. Was great. You will do fine and have an amazing time. If you look in the NZ forum you can see the route I took somewhere. It is all good in my book. Not a bad road in the entire country and it was real easy to get around. Have a great time. I have been there 3 times and plan to be there more for work. Awesome place.