Yes, that is pretty much what I carry. Maybe you'll need it, maybe you won't. NZ weather is only slightly more predictable than the shakes. You are aware NZ is known as the Shakey Isles?
It's important to realise the west coast of NZ can be a very wet place, much like northern parts of the US west coast. Last year I had to sit out two days of torrential rain at Moana, near Greymouth. Many of the roads I wanted to ride were closed by flooding, land slips and washouts. And visibility was so poor that it was far too dangerous to venture on the road.
As you know I have also bought the TA maps, however next visit I'm planning to ride the route of the
Great Southern Brevet. I tackled some of this route on my touring bike during a previous visit (as you will see in my journals), but the gravel roads were difficult with skinny touring tyres and I chickened out riding some of the more rugged sections and some of the bad weather.
I've now built a Fargo and I've managed to organise my gear to fit into bikepacking bags, so I'll revisit the route soon - hopefully in April if I can get away from work commitments.
By then I'll have ridden most of the South Island part of the TA, so I'm planning to tackle the North Island next.
Here are the promised links to my journals. They should give you idea of the delights to come. Hope you find them useful.
Chasing the Long White CloudGone Fishin'North of South