G'Day to both of you,
Not to seem negative, but your time frame is not likely to be a good one for that trip. Just the opposite will be happening: folks in the islands will be heading either to NZ or Oz at that time, for the 1st of November is the "official" start to the cyclone season.
You would have better chances of catching a ride at that time in Suva, Pt Vila or Noumea, heading for either NZ or Australia
Cheers and good luck