Seeking parter(s) anytime from 13/12 through Feb.

I'm from the U.S., and am exploring both islands for the next three months. Ideally, I'd like to find someone who is an experienced tramper, and either knows NZ well, or would like to explore some good (and especially off-the-beaten-path) routes. I am in my early 50s, but am in excellent shape. I am open to both day tramps, and longer ones up to 4/5 days. I have a car, and would be happy to drive and pay for the basic expenses. I'd even be open to paying a reasonable fee to someone who is an expert, and could show me some routes that I would be unlikely to find on my own. I am fairly flexible, though am currently in Rotorua, and planning to make my way south. Cheers! Tony