So if an Australian BP carnet doesn't work down there, do credit cards (most bp pumps don't even accept credit cards in oz-found that out the hard way). Or you just go to airports with trucks that can come out?
I presume you already have an Aussie BP carnet. If so get BP to supply you an New Zealand one. This will be your best bet. Credit cards won't work at the pump.
Most larger regional airfields,e.g. Kerikeri, Whangarei, Ardmore, Hamilton, New Plymouth, Napier, Palmerston North, Nelson, Omaka, Wanaka, Queenstown, Timaru, Invercargill and a few others have operators who will sell you avgas during normal business hours, usually 7 days per week.
There aren't many places with a truck and then they'll want a carnet most likely.
Were you ever ramp checked over there for ASICs/etc?
As I mentioned in an earlier post, very unlikely and then only probably at a major airport like Auckland or Wellington or Christchurch. A security card is not required, though at any airport where there is RPT flights you should always have your licence and or some form of identification on you.
Also for the trip across did you get a life raft that conforms to CASA requirements (TSO'd) or just any one? Does it even matte
Actually your'e probably better off with a marine liferaft, at lot of aviation ones are crap in comparison even though they may be TSO'd.