For my upcoming trip in August, my parents are flying home from Orlando on a different flight than the one my wife and I are on. I've had some trouble in the past with the Disney Reservations people getting confused when I try to explain this to them, so I'd like to keep things as simple for them as possible. Could I simply tell Disney that we're all flying back on the same flight (the earlier of the two) without messing up my parents' bag check on the day of departure?