There is no limit on what you can carry in hawaii as long as it isnt concealed!
I have carried fixed blades around town (eastside oahu) and gotten some looks but nothing more. I wouldnt carry a fixed blade to the mall but I do on hiking trails and around my house...
If you are carrying for SD do not tell the cops. When I talked to the guys at the Kailua station they said basicly it is all about what your intent is with the knife. If you want/need it for work then they dont care but when you are carring for SD is when they care.
From what I got from the cops it is ok to carry a knife with a pocket clip because the pocket clip is visable...dont take my word for it though. Google knife laws in Hawaii and check for yourself.
What island you live on, what city?
Oahu, Kailua here.