Regarding GT fishing....I don't think they really do it on Rarotonga. Aitutaki is better for that from what I've heard. When I was over there (Raro) last December I inquired about GT fishing with some of the charter companies at the wharf and they all said because they don't eat them they don't catch them and the GTs that come up to the wharf are treated like pets. I reckon you'd be better off taking your own stickbait/popping gear if you have it and ask in the fishing club.