I just came back from a weekend camping trip (and planning for the next one), and I can totally relate to the stressful feeling! But planning will help A LOT! I made sure there were breakfast options I could live with, and lunches were easy sandwiches. I made chili for the first night's meal (so we didn't have to cook while we were still setting up camp), and it was healthy as well as tasty. Easy to transport in Ziploc bags in the cooler, too.
Most camping dinners, I've found, are based around protein and starch. Light hot dogs and baked beans fits right into my program. Spaghetti doesn't as much, but I can still have a small amount of pasta, and an extra portion of sauce. And if I've made the sauce ahead of time, rather than using a bottled sauce, I know it's got extra veg in it. Hobo dinners are always easy and tasty, too... aluminum foil packets of veg and meat, wrapped up really tight and cooked in the coals for 15 minutes. Can be made easily, and can be customized for almost any taste and plan.
THen, I made sure we had "supplementals" for me, to fill out the regular menu. Cut carrot and celery sticks in the cooler, with hummus. Fruit (apples worked well. Bananas didn't last very well outdoors). Snacks can be things like jerky, yogurt, hard-cooked eggs, nuts, cheese sticks, and protein bars (very helpful when hiking!).
I also planned for two s'mores (150 calories apiece) each day, because it's just not camping without them. And I was surprised to find that I was completely satisfied with only two, when last summer I would have eaten a LOT more.
The other fun thing about camping is that food is only a small part of it. You're going to be doing outdoorsy things... hiking, swimming, boating, walking... and getting extra exercise. So that should fit into your plan well, too.
~~ Synger ~~