There are three key elements to travelling: packing and preparing; the journey; and what to do and where to go once you are at your destination. All have to be considered from the gluten free perspective to avoid upsets.
Before you leave, this is the time to plan ahead so once on vacation you can just enjoy yourself and not have to improvise solutions too much of the time. When booking your accommodation, think about the availability of gluten free food. If it is self-catering, you only need to worry about shopping for gluten free foods. Perhaps a few things you are used to having will not be available, so pack a few non-perishables in case. If you are staying in a hotel, investigate the restaurant and room service menus and consider whether you need food-preparing or storage facilities in your room.
On your journey you will need to eat, so make sure you have plenty of filling gluten free snacks in case gluten free options are not available, even if you expected they would be.
Once you are at your destination, the more information you have already gathered about the availability of gluten free meals in restaurants and the location of markets and stores where you can stock up with gluten free foods, the more you will be able to use your time well and have a great trip. The keys are checking ahead and making sure you can communicate your needs – assuming there may be a language barrier to overcome. Travel with coeliac disease or non-coeliac gluten sensitivity need not be a problem, especially if you are proactive about preventing potential issues.