If it were just us traveling, there wouldn’t be as many problems. I figure out exercise and can eat normal (for me) amounts, so the only thing I need to adjust for is the additional calories stuffed into restaurant food.
Essentially what I think happened is I conditioned my body to need very little when I delightfully used the fact that I never get hungry to lose a bunch of weight (by not eating) right after radiation. (Big Loser style for anyone who has read about those effects.) I wish I had known at the time about that sort of permanent reconditioning as I didn’t have to do it, but… such is life.
At home, I always make time to eat breakfast - either a bagel/toast if in a hurry or two fried eggs with a sauteed mixture of potatoes (switched out for yellow squash in season), mushrooms, all sorts of peppers, onions, and spinach. Lunch is usually non-existent, but can be a couple of dark chocolate covered almonds or something very light. If at school it’s fruit and yogurt. Dinner is usually something fairly healthy and low cal with small portions for me. When I’ve kept track on an app before it’s always under 1500 calories and probably a fair bit under as the app didn’t allow one to go very low with portion sizes. Exercise is always a minimum of 10K steps and daily motion is pretty common with the various things on the farm. If I eat a true lunch, I’ll skip supper instead. I can do three light meals if needed (happens when kids are home). We go out to eat a couple of times per week, but even that doesn’t put on pounds for more than a day (typical variance).
But when traveling, it’s not just dh and I most of the time and we rarely cook. Our families/kids expect to eat three meals per day - full meals - and many of those are at restaurants. Even when they’re at one of their houses, it’s more like a feast than a meal. If I opt to get nothing or very little I get lectures about how unhealthy that is - not just at the meal - but at any particular time of the day when it might come up. (This is mostly from my parents, never my kids.) Even taking the lecture part out of the equation, have you seen the calorie count at restaurants? I can easily get more than what my body needs just with breakfast at a fast food place. Then 3 hours later they’ll be pulling into a Chinese buffet (just happened - last trip) saying it’s time for lunch (HOW can anyone be hungry so quickly after that breakfast???). Then there’s supper later - Hardees anyone (what, more food? seriously?)? I eat as light as I can to still be sociable, but it’s far more than home - then remove the exercise - it can be difficult to even get 2000 steps in and the rest is mostly sitting. Weight comes on quickly and I feel incredibly stuffed always wondering how folks can eat so much, but such is life. Their metabolism is set up for it. Mine used to handle it too. I naively ruined it - and getting older probably has a part as well.
When it is just hubby and I traveling (for fun), we like trying local specialties, and I’m not looking to change that. We don’t worry about whether it’s healthy or not. It’s temporary. I’ll mostly skip breakfast then (hotel offerings are usually lacking for my non-sweet/white bread taste buds anyway) and we’ll have one main meal of the day - often lunch. I’m sure he gets hungry, but he’ll scrounge and find some things or we’ll stop for gas and he can get something at the store there. I gain some, but nothing compared to traveling with others. The worst part there is I switch to full sugar sodas (for the caffeine) since it’s tough to brew tea and I don’t care for cold teas.
I’ve never really been a smoothie person - not even here at home. I have a blender, but it hasn’t been used in eons.