Bacpacjac the mom here:

-Foods familiar to the kids that you know you'll eat?

-kids meds?

-Duplicates of their favorite stuffies, blankies, etc. (leaving the originals at home - if the original gets lost that far from home it could be a disaster in itself.)

-flashlights for the kids (unfamiliar places can be scarey, especially in the dark)

-stuff to occupy them on the flight and on any layovers