Sue - I have exactly the same dilemma.... I am flying to Rome later this month and back from NYC. I normally use bucket loads of moisturiser 'en flight' and hate the thought of not having my lipstick.
Although I am CW this trip, in First last year the amenity kit had a small pot of light moisturiser which was quite nice, a similar small pot of eye gel and a small hydrating spray for the face. I would be more than happy with these for a transatlantic.
I remain confused about the lip balm/salve, and will rely on getting one in the CW 'kit'. I was thinking of taking a lipliner pencil for a little lip colour??
As I am a 'lady of a certain age', these things are 'vital' to my frame of mind (i.e. mood!!!)
Good Luck and enjoy your trip.
Katie