have a great trip, SI. i was on a plane/business trip and announcement said , "is anyone a friend of bill w.?" i thought, wow way cool. somebody needed support on our trip and thought of this. so this is a good plan if you feel like a drink on the plane.
as for hotel room...try to stay out and about during the day/early evening to not be in the room so much. that should help. take snacks/sugar to cut any craving if need be. call an AA friend where you live or your sponsor/take phone numbers. will reinforce the positive.
and u're right, you do have a CHOICE. just remind yourself of how you felt on your relapse and how tough the road has been. you never ever have to feel that way again.
take your higher power in your pocket and some literature too. will keep you in my prayers, for real, that you have a wonderful sober time plus visit with family.