We stayed for about a month during the time Pete NoTies was there and we certainly loved being out at the anchorages, then popping back in to Neafu once per week to hit the pub, get water
and ... well there was not much else to do... LOL
All the cruising people there are pretty damn cool because to get there you have to cross an ocean (at least one).
Theres a few charter
people but not too many, and even fewer resort based tourists.
And the whale watching is great! Only downside is the local whale spotting boats will heard the whales and get too close excluding you even a small close up look.
Have fun there