Honeymoon Planning

I sat down with a guidebook to New Zealand last night (several guidebooks, actually) and realized, once again, that there are way too many things to do and only 13 travel days to do them in. One of the things that must get done is visiting with the rellies in Te Awamutu (on the North Island).

So, given a limited budget and limited time, what would you do in NZ? Right now the loose plan is backpacking--a tramp or two, a city or two, and the rellies. Any suggestions for specifics?