Was there a few months ago. X2 on Hanauma Bay. Biggest bonefish I've ever seen there. Some in knee deep.
Tons of reef to fish around the island. Look up whipping. It's a very effective way to fish from shore. And it can be done with cheap tackle you can buy locally. No party boats but you can find share boats to take you out for a day. I didn't kayak there but there are a few rental places I found online. Summer time means south swells so watch out. Also winds can kick up quick and right now is the start of Hurricane season.
Here their fish regarding site. Less rules. Easy to learn.
http://dlnr.hawaii.gov/dar/fishing/fishing-regulations/