Sarah,
You could be right as I had never seen a roach before in person. If they look similar to the other mentioned bugs, then I could be mistaken.

On our honeymoon we stayed at Kona, and I have to say that we encountered two really mighty bugs. One was in our motel room; the other followed us from the beach to our car and tried to get inside, flying up against the windshield time after time. He was large and bright blue, kind of like a hornet. Other than those memorable experiences, we've been bug-free (except in Provence, but that's another story!).

I have seen both and they look so similar. The beetles are not associated with filth as you know roaches are. The beetles are about moisture. So a bit better to see the beetles, yes? If not remember it was a fluke and at such highend resorts a super fluke in my experience.

On several visits to Hawaii, staying in average or slightly better than average hotels, I have never had problems with bugs except when out hiking in wet areas when mosquitoes can be a problem. I would also echo a previous comment on this thread: traveling from one island to another is typically more cumbersome and time consuming than would appear on the surface, potentially wasting most of a day. So if your total time is limited, I would recommend choosing a single island to spend your time. Have a great trip.