My DH has a conference at an all inclusive in Cabo when J will be 4 months old. My MIL thinks we need to leave the baby home, I think he'll be fine and I'm not ready to leave him yet.

Thoughts? Suggestions on flying/time change/etc? Does he need a passport?

ETA: it looks like I'll be flying one way by myself with him so suggestions on that would be helpful as well.