FUEL; in NZ, BP and Z have bowsers everywhere but credit card always works, however for credit card you must call ahead. In fact, always call ahead just to be sure.
Most smaller airfields in NZ will have a swipe bowser but no one there who can take credit cards for payment, or if there is you have to go traipsing around to find who will, so best to get a swipe card that works in NZ.
Definitely check that LHI and NSF have fuel especially NSF as weather can disrupt delivery.
between NF and NZ there is 100nm out of range between KT and NF NDB.
Probably depends on your ADF receiver as both KT and NF NDB's are pretty powerful. I know that some ADF's will pick up KT on the ground at NF well at least that used to be that case. I've been there once and had ADF coverage all the way.
DAF??????? do you mean MPI? or the old MAF?
Here's what you need to know
Aircraft | MPI Biosecurity New Zealand