A few ideas:
- There IS more you can keep in the minifridge- low-fat cheese wedges, deli meats, Greek yogurt, hummus, etc.
- Perhaps decide on a meal out versus meal in exchange system... such as always committing to eating 1 meal from your minifridge (breakfast?), 1 meal at a restaurant where you've looked up the cals beforehand, and 1 "don't stress too much" meal where you try to choose a somewhat healthy option at a restaurant without being too restrictive. You can always switch up which meal is which- such as if you want to have a luxurious brunch one day and make your dinner a meal "in" that night.
- It may sound weird, but Intermittent Fasting helps me a TON when I'm on vacation. Usually instead of stressing over 3 meals and eating way too many high-calorie options, I will eat a large, balanced brunch at 11 or lunch at 12, not be hungry until 7, then eat a medium-sized dinner and get full quickly. It cuts out on the needless snacking and manages my meal sizes. I find when I eat fewer meals a day I am able to stay within calories more easily because I get more full more quickly. Personally I'd much rather have 2 enjoyable, full meals than 3 that I stress over and usually end up overeating
- Get in movement and exercise. Working out isn't going to counteract a 1500 calorie dinner, but if you guys are walking around the town, doing activities, renting bikes, etc you will at least contribute towards a caloric deficit, possibly curb your desire to overeat (because you feel so good from exercise!), and stay active. Sometimes just lying on a beach is super fun, but I love getting a lot of walking, biking, and exploring in when I'm on vacation.
- WATCH THE ALCOHOL! It's so easy to order that glass of wine with dinner or go out for drinks... if you drink perhaps limiting yourself to 1 drink a day at most.. and avoid the high-calorie pina coladas, margaritas, etc!
Have a great trip!