Great thread, all of you. I thought I knew everything about the permit system, but got several good ideas.
I particularly liked the idea of using the Filter option to show only the desired entry trailhead at 7am
Also the idea of using the back-forward arrows repeatedly to see the exact time the new date opens.
Experimented with trailhead filter today

Image also attached in case you can't see the embedded one
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John Curran Ladd1616 Castro StreetSan Francisco, CA? 94114-3707415-648-9279