A few things that have worked for me and my increasingly control seeking toddler (and that travel well) lately are:
Freeze dried fruit (Mango, pear, apple, etc.--Found at health food stores, Trader joes, Fresh Market. Wal-mart even carries Disney brand with Mickey on them! They're crunchy--we call them fruit crackers.)
Freeze dried peas and corn (
www.justtomatoes.com--Really! Try these! They are crunchy and crispy and yummy with nothing added. I know kids who eat no other veggies who will sometimes eat these.)
Pouches of baby food fruit/veggies/fruit&veggie/applesauce combos (
http://www.plumorganics.com is one company--these are GREAT for on the go or stirring into plain yogurt. My son devours these. Just pop the top off and slurp.)
Earth's Best brown rice bars--like rice krispie treats, but made with yogurt--less sugar, more protein, whole grain (and Elmo!)
Yogurt covered Raisins (At our house, often mixed with whole grain goldfish, cheerios and pretzels)
Packets of oatmeal (hot water can be gotten at any place you get hot tea)
Carnation Instant Breakfast (or a healthier, lower sugar protein powder)
Kefir (fruit flavored drinkable yogurt--needs to be kept cold, but is a great nutrition packed food)
Really, you'll never know what will work this week until you try. And yes, what works today won't work tomorrow---and none of it may work on vacation. She won't starve herself, but it's always hard to remember that in the moments when she's screaming and clearly hungry, but won't eat any of the things you offer. Just be patient and make sure she's drinking water or milk. Try to make the things she does eat count.
One thing I can suggest that may be counter intuitive is to cut down on snacks. Poor thing skips breakfast, so she's hungry. But if she has the option of munching little bits all day long, it's unlikely she'll eat anything other than the little crunchies she wants to eat. One tactic I use is to offer something on his approved but not preferred list when he's hungry after skipping a meal (he eats a paltry breakfast, so I'll offer broccoli or peas as a midmorning snack. He'll eat it if he's hungry, but he won't love it like he'd love a bowl of chips. If he eats it, he gets something like cheese which he eats more readily, but is still nutrition packed.)
Enjoy your trip!!