Speaking of gadgets, ive recently learned that for phones there are GPS apps which rival my several hundred dollar garmin. I guess the only issue is that phone batteries might run out faster than a garmin. I downloaded the app called "NZ Topo50 Offline South Island Map" and it seems to work ok (there should be a north island version), costs a few dollars. Of course cant 100% rely on technology as sometimes things go wrong, so having a compass and printing/laminating a topo map of the area is always important for backup.
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