I've caught big Ahi there in June. There are flats to fish all around the island. Some bonefish, although not many.... I found decent flyfishing for reef fish with a 6 or 8 wt. The link below is to a guy named Coach Duff. He's actually a local to the Seattle area, and although I've never booked a trip with him, he has always been great to talk to. It would help break the learning curve over there tremendously to book a day or two. Jealous!

http://www.hawaiibonefishing.com/index.cfm