Just back from two days of travelling. I managed to stick to my plans:
Breakfast buffet: no more than I'd've eaten at home
Lunch: simple sandwich, fruit, lots of water and tea
Snacks: fruit, water, tea
Restaurant dinner: salad (chicken caesar), water, glass of wine, coffee
Exercize: well, I was lucky in that the hotel was having its elevator replaced, and my room was on the 4th floor, so I got to do some stairs. I also took the train homeward from the airport and pulled my suitcase home up the hill from the station (a 300-foot climb over about 3 miles).
Dinner at the airport on the way home: sandwich, banana, water ... and a brownie I gave up resisting
I'll take a sneak peak on the scale in the morning to see how I did.