You’ll never again travel as heavy as when you travel with a baby. It’s shocking how much gear such a little one requires.
2 outfits per day of trip
Jackets and sweaters of varying warmth
Change of clothes for plane (in case of accidents – bring a change for baby and parents)
Ziploc bags (for locking in odors after a diaper change)
Crib sheet and blanket (particularly for babies with sensitive skin; also, a familiar sheet can help ease transition to a strange crib)
Baby food and soft baby spoons
Crayons and coloring books
Note on packing clothes for babies: check the sizing of all outfits. If you are going away for 2 weeks or more, the baby could outgrow some of the clothes if you set stuff aside a week of so before the trip.