My knowledge of FF in Hawaii is for bones on Oahu. Did a bit of peacock fishing on Lake Wilson there, also. Talk to these guys. They may have the info for you, and could have some leads for your trip. It's a different world. Numbers of bones aren't great but the fish are BIG!!! If you want, PM and I'll get you my phone # and answer what I can.
http://www.nervouswaterhawaii.com/