C.
My daughter is one year old and has been on a plane 5 times, so I've learned a few things. I would suggest taking a stroller, but one with a tray to double as a highchair. It's also nice to have your own b/c it can be used as a luggage carrier in the airport. Don't worry about bringing too many toys because everyday items--toilet paper rolls, snack wrappers, keys, etc--usually offer just as much appeal and don't have to be packed. In regard to the pack-n-play, you can probably rent a crib from your hotel--most have them available. You may want to bring a couple crib toys and blankets that your baby will recognize. I also always bring music since my daughter is used to listening to it as she falls asleep at home. If you're renting a car you should be able to rent a car seat as well (and it's worth it). One more suggestion for the plane--bring a bottle or binky for the way up and the way down so the pressure doesn't bother the little ones ears. Good luck!!