I do most of our cooking on our Coleman camp grill outside, and most of the time use paper plates.
One favorite meal is, I brown up some kielbasa (I use turkey because beef gets pretty greasy) and red bell pepper and onions, then dump them onto a plate, then use the pan, without cleaning it, and throw in frozen diced potato hashbrowns (not the shredded) and cook those up. I season with steak seasoning since that's my all purpose seasoning I keep in the camper. Then, combine everything together, top with some shredded cheese if you like, and eat! My husband likes to have a couple runny eggs on top too. We do this for breakfast/lunch (we eat breakfast late, like 11am), but it'd be good anytime!
I'm also a big fan of foil packet meals. If you prep ahead and use paper plates, no dishes at all!
Another thing if there's a group, is I buy premarinated meats either from Costco or from the deli counter, and grill those up along with some kind of grilled veggie (zucchini, asparagus, mini sweet peppers, whatever), and then some pre-made, either store bought or homemade, pasta or potato salad. Again, very little dishes.