It depends on the trip. On short trips, I just have breakfast stuff and snacks.
On longer trips, or depending which family members we bring with us, I have been known to cook the majority of the meals. Last June when I drove the in-laws down, I premade things ahead of time, sealed them into food saver bags and froze them, and layered them into the cooler. I made meatballs/sausages and sauce, taco meat, and chicken/gravy to go over waffles. We had meatball and sausage sandwiches, pasta night, build your own tacos or taco salad night, white chicken chili, and made chicken and waffles for our friends who live in Kissimmee and miss that Pennsylvania Dutch treat.
Occasionally if I am driving, I bring my crockpot. Usually I will plan what meals I will make with it, premeasure all my dry ingredients for my recipes at home into a Ziploc bag, and get the meats at the grocery store.
When we stay in a villa at VWL, my DD9's tradition is to bake brownies at the beginning of our stay...let me tell you that can drive the guests passing in the halls entirely crazy
Last year when we stayed at VWL, I also made a small turkey on Thanksgiving Day.
So yes...my kitchen definitely gets use when we are in a villa at Disney