I like 6″ Slug-go for snapper fishing. Rig with a 4/0 worm hook and ball sinker, best fished drifting from a boat but can be used from the shore.
The Berkley Gulp range of scented baits are the most popular.
Been years since I been to Motueka but wharfs are always worth a try. They provide a nice platform for night fishing and easier lure fishing. Alternatively find a nice sheltered shallow bay.