I know of both of those spots you mention and have had fairly consistent success there. Sorry, but I’m not helping either. Call me a dik, but the public areas are small and hard to access on Oahu. I’m glad it’s that way as if it were easy it would be overrun. That said, the state eradication issues have changed things. I go to Oahu for biz every year and haven’t hunted there the last two years because of the eradication efforts. There’s simply better hunting elsewhere. Yes, it’s a process and it takes some research. But guess what, the entire western 48 used to be the same way! And the hunting used to be better and tags a lot easier to draw! We’ve gotten so used to the internet making things easier that we’ve forgotten that rewarding things take effort. I’m glad Hawaii is still that way! Opportunities are there for the dedicated.I tried to do the same a few years back. Ended up never taking my bow out of the case. They will sell you a hunting license but they I don't think they really want you
to hunt. Information is very, very sparse. I had located a couple WMA's I wanted to hunt. One in particular looked promising.
Took me 3 days to find the entrance to it, no signs, road names, NOTHING. Entrance was on a no name road leading up to a convent, the only signs were about the convent. So I find the entrance up this little dirt road only to find a closed gate with a sign telling me I cant go in due to aerial culling operations in process. This was NOT in the regs!!! The other place on the other end of the island supposedly bordered a 4 lane hwy going over a large mtn.
Again, no signs and no pull offs. The whole length of where its "supposed" to be had a 6ft. high chain length fence border. The only place to pull off was an overlook / park thingy where some battle took place. The "authorities" were sure on top of things when making sure you paid for your parking but were totally ignorant about the WMA this place was supposed to be on. The locals somehow forgot to speak English when asked anything about hunting, even the cop sitting in the parking lot. There were tons of those Jungle chickens and Roosters at this spot just begging to catch an arrow.
So do your research and be prepared to be frustrated because no one will offer any help. This was on Oahu BTW. As far as bringing a gun, if I can remember correctly you can but your supposed to register it with the local police the same day you arrive. Was too much of a PITA for me so I took the bow. But like I said, never took it out of the case.
Maybe the other Islands are different as far as hunting. I certainly hope so.