Consider booking a hotel suite
When staying in a hotel with your kids, if you can, book a suite. You'll have a separate room in which to put the kids to sleep (no more hiding out in the bathroom while you wait for them to nod off). You'll also (most likely) have a fridge and an extra sink, which means you can store baby food, milk, and snacks in your room.
Swing by the grocery store for some cereal, milk and fruit (ask room service for bowls, plates, and utensils). You'll make up some of the money you spent on the suite, and you'll have breakfast (and, possibly, lunch) ready whenever you are.
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