Many people will use a benzo in a small dose to help keep the anxiety low. Do you use anything now for anxiety? If not you may want to contact your PCP and get enough to cover your trip. It helps you relax and sit back, just listen to the music.
Just remember you will be ok, keep telling yourself that. My mantra is " I am just fine" repeat it slowly over and over in your head while concentrating on slow easy breathing.
Have a great trip.Kitt