Thank you, everyone! Unfortunately, when check-in opened last night at midnight, the app was not working. We tried that for a few minutes, then switched to online check-in. By the time we got to select our time (at about 12:15,) the earliest available was 11:30. I had really gotten my hopes up for an earlier time, but hey-- 11:30 is still not bad. Now that we're all checked in, with boarding passes in our Apple wallets, it feels official!