I just talked to Lance the skipper, His season down there at Greymouth is all August and half of September. When he arrived this year, another boat had just landed a couple of SBFT, and it took a week before any NBFT. Lance indicated that early August would be the time to attempt to cube some SBFT to the surface for a shot on a popper/jig, if that fails, throw hoki at the trawl nets and target NBFT on Heavy Tackle.
There are other charter boats down there, But as I said before, Lance is the man.