N IS FOR NUTRITION
Whether camping, road tripping, or air planing, your diet changes. Partially because of what's available to you and partially because of what you feel like eating.
Personally, I think airline and airport food options and quality has vastly improved. There are not only restaurants serving lighter options, but the "convenience" outlets have become fresher and tastier as well.
At least, in the airports that I have frequented.
It's nice because to me traveling doesn't qualify as a reason to "cheat" on my diet. And feeling stuffed with little chance to move around is uncomfortable.
Road trips, on the other hand, is a reason to "cheat" for me. I mean, what else was a drive through made for? It's an irrational thought because I am not really moving any more than if I was traveling in a plane.
Camping, from what I hear many people tell me about, is also a reason to eat junk for however long the trip is. Hamburgers, hot dogs, popcorn, beer, marshmallows, etc. not that those things can't be healthy but a lack of refrigeration capabilities limits how healthy you can really eat. Your potential saving grace could be that you go on hikes or go swimming or something.
Operative word being potential.