We did BLW with my MPI LO, so while I would bring a lot of her food with me, it was never purees. Like Vicki said, the organic section of the supermarket can give you some good choices - crackers, hummus, nut butters, etc She would have a lot of fruit, and veges that don't require cooking eg cucumber sticks and tomatoes.
Will your hotel room have a fridge? When I knew we would have a fridge I would bring food from our freezer also - it would thaw on the trip but was then fine in the fridge for a couple of days. Mostly components, rather than full meals - eg, homemade fish cakes, meatballs, vegetable fritters, etc. When at a restaurant then she can have some of that, and anything we're having that we're sure is safe - my LO will always eat plain rice!!! And I would always have plenty of safe snacks for her - homemade sugar-free cookies, muffins, more fruit etc.
HTH