Bruce , Call 1-800-ama-join and ask to talk with Bill Amick or Hugh Fleming. Best to call during middle of the week.
The benefits from being involved with the AMA are many, the most important is National recognition.
Look at any publications and see how non AMA events get covered compared to AMA events.
The insurance available to clubs / promoters are designed to cover motorcycle events, not a one size fits all coverage packages.
Since you are heavily involved with being a volunteer just keep that in mind--most of the AMA is made up of volunteers also.
Folks think that by getting involved with the AMA means they can sit back and let the AMA do everything. The AMA is a tool that will give your program credibility and leverage---
when used properly.
Below my signature is the web page link , you can go there and find e-mail addresses and make your contact that way.
Let me know if I can help in any other way.
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Ken & Diane James
AMA Field Reps #869
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If you don't--Who will?
AMA-Cycle.Org