I don't trust eating restaurant pizza, they normally add low grade oils to the pizza dough which are not OMS compliant. Unless it's Sushi without dairy, or a prearranged meal, I take some cans of tuna in water, with Pita bread and salad for a "make shift" meal.
I have found many restaurant meals contain low grade oil so always ask for all of the ingredients used. Often waiters don't know or even bother to tell you about the oils added unless you make a point of asking. I have, on many occasion, asked the waiter to check with the chef and they have come back saying that "the chef said that there is a little bit of oil added, but not much!", so be very weary, it's just not worth risking your remission.
Also, if you type "eating when on holiday" in the search engine you will find many results.
Good luck, but to me when travelling it's all about "living to eat SAFELY ".