Thanks to everyone for giving me some good words of wisdom and some more things to think about. Ultimately I've decided to go. I found a pretty good deal but will only be on the ground a little over 24 hours.
For another data point my availability is summer '17. I'm hoping that most of us who got Day 1 invites have later availability dates and that's the reason for most to be in the Day 1 pool vs Day 2. Did anyone get a Day 1 invite with an availability date soon? Perhaps before March '17?