Look at the work the CalGuns Foundation is doing in the 9th circuit on the Federal level as there's not much indication that the people of California or Hawaii will require their governments to changes at the state level:
Calgunsfoundation.org Home Page
I'd suggest you consider supporting them and trying to organize the gun owners in Hawaii to establish a similar organization.
People don't like to be meddled with. We tell them what to do, what to think, don't run, don't walk. We're in their homes and in their heads and we haven't the right. We're meddlesome.--River Tam