Cool guys, is the process fairly easy coming back the other way? Just go through Australian version of MPI and customs at Norfolk?
Yep pretty easy both ways if you go Lord Howe and Norfolk.
Leaving New Zealand you only need to deal with customs, no need for MPI,( they don't care if you take nasties with you but do care if you bring them in.)
From memory at both Norfolk Is and Lord Howe Is you do the formalities when you arrive with customs and ag and any other fees, refueling etc. It pretty laid back and the local are very helpful and friendly. When you depart you just saddle up and leave. I think you need cash for the fuel at both places.
From Lord Howe you can depart to any place you want on mainland Oz.