For information that I can gather about amateur radio in the Hawaiian islands I post it on the Ham radio hawaii facebook pate at

On the left side of that page there is a Files section where you can download frequency maps, DMR code plugs and other useful items.

Feel free to post items in the files and also comments on what you are doing with Ham Radio in Hawaii.

It is hard finding out what goes on so please post in case others have the same likes as you do.