How much do you tip town car service? Do you tip on just one of the trips or both? If we use Mears, do you tip them? How much do you tip the maid? Bell boys? I read it might be possible to upgrade to first class at airport. Can you do it if you go on line and get boarding passes ahead of time? Is it only for one leg of the flight or if there is a lay over will it be for the next flight also? Can you take aerosols in luggage? Someone told dh they would not allow batteries. Is that correct? Like for cd players and stuff. Thanks for any help.