demo liability
River Rat,
It sounds as if your club is NOT involved with the library demo. Therefore, I would seriously doubt that you would be covered by the AAW policy. And, as Old Griz correctly pointed out, at club sponsored demos only AAW members are covered for liability when turning.
Check with the library about liability. If you are not covered by them, then you may want to reconsider.
Check with the insurance company that issues your homeowner's policy. You MIGHT be covered by that, but make them determine that before you demo.
I'm doing a demo at a frame shop/"gallery" on Saturday and plan on turning at a slower speed and making only small objects. No bowls. I always turn a few mushrooms to give away. I got this idea from Stuart Batty. He told of doing a public demo on turning square bowls while the guy next to him was doing mushrooms. His audience was one-fifth that of the mushroom guy.
I don't have a plastic shield to put between my lathe and any onlookers, so if a child gets too close I will simply turn off the lathe, smile

, and talk about turning. Once I have told them where it is safest to stand, and they have complied, I will turn the lathe back on. My point: The demonstrator is the best person to reduce liability problems. My regrets: We live in a litigious society.