This is very tricky.
So the location is near one of the 6 locations mentioned on their page. They also have a bunch of clues. Maybe need to plug in all the numbers into a GPS coordinate?
Here are what I think the clues are:
When it comes to rivers, lakes and streams there are more than 41 below, above and around Moana
Is it no. 8 wired to the back of a Lake Brunner trout?
Could it be deep in a cave at the Oparara Arches?
15 kilometres down a gravel road you’ll find an untamed paradise of rain forest, caves, moa bones, whiskey rivers and endless adventure.
The beauty and wilderness is heightened by the backdrop of the Southern Alps, New Zealand’s highest mountain range with 19 peaks reaching three thousand meters or more.
A 17 minute stroll along the Dolomite Track will loop you around these stunning thirty million year old limestone structures that can launch sea water up to twenty meters in the air!
The Franz Josef and Fox Glaciers are 2 of the most accessible glaciers in the world.
I guessed -41.8150, 172.1900 but have no idea if that's right.
Winners will be chosen at random by software, from all entries in a 2km radius of the chosen coordinates
Let's hear some guesses.
For one guess I chose the coords that are repeated, like al rm said they may be a simple typo but for 10k I'd say possibly not. for my second guess I went 41°08'15.19"S 172°19'09.0"E (-41.137553, 172.319167) which is closer to the arches than al rm's as it takes into account the no. 8 wire clue. Only time will tell though I guess
Or the other thought I had had was if the coords were simply (-41.81519, 172.1909) but it looks a little to inland for me to call "close" to one of the mentioned locations
Maybe 41°15'19.0"S 172°19'09.0"E (-41.255278, 172.319167) in Kahurangi NP? That's just using the numbers in italics in sequence. Also maybe 43°23'16.4"S 170°11'32.4"E (-43.387889, 170.192333) at Franz Josef, if the italics are a red herring. It's probably, an error but these co-ordinates are repeated as the location of every clue. Used that for my 2nd guess (after FB post).