Some trips we cook a lot. Other trips when we know we'll be busy, we anticipate we'll cook some and eat out more. We like to precook foods at home and put them in the freezer. We freeze them flat so it doesn't take long to thaw. We'll also throw some frozen hamburger patties in the freezer as a back up. I like to use the smoker at home and always cook enough to stock the freezer. Pulled pork or pulled beef is a good base for dinner. Thaw it in the morning and you can make bbq sandwiches, nachos,taco, etc.
Some times we bring enough leftovers home to get us through for a couple of days so while we're recovering from the weekend, we don't have to worry about dinner.
I say cook as much or as little as you want. Eat out as much or as little as you like.