Lay them on me! We're flying 6 hours to Hawaii with our 15 month old (her first flight!) and staying in a hotel with adjoining rooms with our in laws.
What I've got so far: bring a night light for sneaking back in the room when LO is sleeping, keep some cheap toys for LO for the flight and bring them out one at a time, have one of us wait with LO to board the plane and get some energy out....
What are your best tips?