Lose weight - I tend to eat more at mealtime, however I am usually pushing my aunt in a wheelchair so that is extra exertion on me so I lose anything I gained by eating. I start out the vacation wearing no belt, but by the end I need to wear that belt every day!
I gain weight every time I go to Disney. I can not resist the food and all the extra goodies. All the sweet smels kill me and I just can't say no. I work at getting back to normal when we get home. To us, it's part of vacation to enjoy all the extra goodies.
DW and I diet 5 days a week, weekends we watch what we eat, but will have special treats we like. During WDW we just eat what we want, and normally return home with 3 to 5 pounds extra. Then back to the 5 day diet.