DUnno if Zippy's cafe has a website but that's the fuky hangout in Rotovegas for mtn bikers. Renting a bike could be interesting...If you do bike in rotovegas (rotorua) the redwoods would be your safest singletrack bet.

I guess you could do the 42nd traverse but not with just the two of you, esp at this time of year.

Again, try the vorb site & ask there about bike rentals on the north island.

Oh then again..Wellington has some good mtn biking as well.

If you can get a copy of the Kennett Brother's guide to Mtn biking in NZ, check it out. THe ground effect site I think has some trail info as well. www.groundeffect.co.nz

c