whenever i have flown night flights i have dressed the kids in their pjs, let them run their butts off in the departure lounge, done all the "boarding a plane" exciting times with them, let them have the first meal/snack and then laid them on the floor with stuffed toys, lovies and a cot blanket. (once i had to sing part of a cd they like to listen to falling asleep at home
)
but it works a treat! turbulance is your enemy as you then would have to pick them up but other than that, we have had a pretty good go
oh, and i don't know if it WAS just the thrill of walking about "in the clouds" but my ds2 toilet trained himself on a day flight trip to Canada at 23 months! asked for the toilet, peed everytime he was there and stayed dry all day and since!