One idea is to simply use Meals Ready to Eat (MREs).
They are tasty, relatively inexpensive (comparative to what you would pay for preparing actual meals) and there is a very wide selection. More than that, they are designed to be portable and can even be heated without use of a fire, using special MRE heaters. This is not a big deal if what you mean by camping is you drive to a park and put up tents in special pre-designated areas around a parking lot. But, it is a VERY big deal if you plan to hike for a few miles and need to lug the food with you.