We had a fantastic time exploring Punakaiki. The bach is within walking distance to all the attractions.
It was great to experience a genuine kiwi bach: deliberately cosy simple, loaded with history and personality, and mostly unchanged for 80 years.
Kayaking up the nearby river was a definite highlight (noting the current is a little swift in places, not for kids under 12 paddling alone), it was stunningly beautiful.
I'd highly recommend this property.