We did things like wraps, bbq steaks, roasted chickens, salads, mini potatoes. All easy stuff to make.
We made a big breakfast one day, but mostly we were rushing out the door and had bagels, smoothies to go. One thing we did that the kids really liked was I used disposable plastic cups and made yogurt parfaits each morning using frozen mixed berries. By the time we were ready to go out the door, the fruit had thawed, sprinkle some granola or nuts on the top and eat in vehicle on way to park. (Not recommended for younger kids.. lol)
When we checked into condo and got our groceries, I did about an hr and a half of prep work for the upcoming week. Washed and cut up tons of veggies, made a huge macaroni salad and bean salad, cut up a couple of roasted chickens, boiled a dozen eggs for quick breakfasts. Just so we had easy stuff to grab. My kids are older and can make their own sandwiches/wraps dish up their own stuff so having it ready in the fridge was great, and I didn't feel like I was cooking the whole time. Dh bbq'd a couple of times and we just used what was already in fridge for sides.