Start at the published coordinates. WP1 is Y decimal minutes away south and X decimal minutes away east, where:
Y = (R*W - 6) / 1000
X = (1000*Y - 10) / 1000
R = Number of letters in name of reserve
W = Number of letters in name of walkway
WP1 is a prominent mark on a small knob 6 metres west of the walking track and wire fence. It is also amidst much gorse. You need not cross the fence and get to WP1 exactly. Stay on the track and use a small triangulation adjustment to arrive at the final location instead.
From WP1, the final location is 199 metres away at a true bearing of 283 degrees. Your triangulation skills should get you to within about 2 metres of the actual cache location.
The cache is near the stone powhenua (sculpture) Te Rauparaha and Te Rangihaeata, which was placed by Tapu Te Ranga Marae. Te Rauparaha was a leading Ngati Toa chief who migrated with his people to the Wellington region in the early 19th century, along with a number of Taranaki tribes. First Lieutenant, Te Rangihaeata was Te Rauparaha's nephew.
Te Rauparaha composed Ka Mate to celebrate his escape from death in a battle. This haka (challenge) has since become the most common one performed by the All Blacks and many other New Zealand sports teams before international matches.
The actual location is at S ??° ??.ABC E ???° ??.DEF, where:
A+B+C = 17 (C is even)
D+E+F = 11 (F is odd)
The cache is a 200 ml (previously 400 ml) sistema container. Please replace and hide carefully as you found it.
Updated 5 January 2011: Changed clues to WP1 due to new signage.
Updated 3 April 2011: Changed clues to final after relocation due to cache having gone missing from the old GZ.