I was SO lucky the kayakers were close by. I'd been sailing for about 90 minutes at that point, and been waving and smiling at them every time I'd get close. (I was smiling at everything, of course... learning how to sail the Hobie just does that!) When I capsized, it just so happened that they were on the lee side of my boat, and that was my first request: Can you lift up the tip of the mast and get it started? The man tried to do that, and he couldn't lift it. He was in a kayak, so I'm sure that had something to do with it. And the wind was pushing it down, I'm convinced.
I installed a "Mama Bob" on the top of my mast today (thanks for shipping it so quickly, CatSailor!), and I'm ready to go out there again. Tomorrow looks good...
Thanks for the encouragement, folks! This is a very helpful community.