We have a 10 day Yellowstone trip planned for next month. It will be my husband, 2 teen boys, and myself. I have a menu planned, and will be precooking as much as possible and freezing in foodsaver bags.
Tacos (twice) - will cook and season the meat at home and freeze
Spaghetti (twice) - will cook the meat and freeze
Burgers - preform the patties, flash freeze, and then seal
Chicken skewers - cut the chicken into chunks, and freeze in marinade
Hot dogs and bratwurst - the brats are already frozen, and the hot dogs will be purchased the day before we leave
Pie iron sandwiches
We will have a long first travel day, and will eat dinner out that first night
Breakfasts will be easy: scrambled eggs, yogurt, granola, bagels, etc
We will carry a cooler for packing lunches each day: sandwiches or wraps, homemade lunchables, snacks, and drinks. We will probably plan at least one lunch in a park restaurant.
I have a list of a wide variety of snacks and fun things like s'mores and campfire cones, since teen boys are bottomless pits
While most of the food we take will be purchased at home, we won't stock up on drinks until we get to Idaho Falls.
I prefer to have food prepped, veggies cut, etc, because after a long day of exploring, the last thing I want to do is come back and cook. It's so much easier to just reheat.