We got a 12 hour night! I just said to DH that there is a pattern: we will have a bad day/days, then a decent night, then a great nap, then a great night, and my LO is caught up. He never does the 12 hour night when I need him to and think he should. It is always after he has already started getting caught up on sleep.
Laura, in response to your suggestion yesterday about a nap on the way over and way back, we are going so early that I don't think he will sleep yet. It would be great if he did, but I doubt it. Plus, by the time we leave, it will be going for 2 pm and that is way too late for a nap. He woke at 6 today, so we are going to try and put him down as soon as we get to their house, which will probably be noonish. Still too long of an A time, but the best we can do.