Realize that overall “healthiness” of your diet may need to take a backseat for the limited time of your trip. That’s OK. In other words, you may find yourself in situations where the gluten-free options available aren’t quite as balanced or nutritious as you might strive for at home. Be easy on yourself.
What if you’re out to dinner and there aren’t many choices, but the menu includes a good (gluten-free) salad and flourless chocolate cake. This meal may be a little low on protein, but go with it and enjoy it. If you need to, supplement with a bedtime snack of some nuts back in your hotel room. Eating out can be a big part of the fun of traveling, so be willing to give yourself a break and enjoy what you can.
One caveat: Don’t over-do it on quantities.