Ok, most of the questions have been answered, but here is a synopsis.
The HRA is older than the NRA, but is still the State Affiliate for the NRA (
http://www.nrahq.org/clubs/state.asp ) (I would love to know who you talked to at the NRA KK, as obviously somebody got it wrong....you got a name I can bring up when I discuss this with the NRA?)
As a not for profit entity, you are limited in what political activity you can engage in without jeopardizing your tax-exempt status. That holds true on the national level (the NRA / NRA-ILA) and the State level (HRA/HCR).
The NRA and the NRA-ILA do support the HRA /HCR. DO they do everything "we" would like? No....but they always help with things like e-mail blasts and other notifications to NRA members about gun issues here in Hawaii.
As for supporting one "organization" versus the others, I would humbly suggest that you should support as many as you can. The NRA is the 800lb gorillia in the corner and always will be. The NRA-ILA is what allows the NRA to exert pressure at the legislative and political arenas on the National, and to a lesser extent, the State level. HRA is the 400lb gorillia in Hawaii politics, while the HCR allows HRA to exert more political pressure. The sad fact is that all politics require money, and donations to the HCR are always needed and appreciated.