S.B.
We camp often. We like the tried and true stuff...burgers, hot dogs sausages, corn on the cob, fresh caught fish etc. But that stuff can get old, quickly.
We love to make fajitas. I put the chicken and marinade in a ziplock bag. I slice peppers and an onion and wrap it in tin foil (the tin foil envelope gets stored in a ziplock bag too). Grill it all up, which takes 10 or 15 minutes. Slice the chicken and fill a tortilla. The premade guacamole comes in what they call "snack packs". Those work well for camping. We usually skip the sour cream and bring some shredded cheese.
Grilled sandwiches are pretty easy to pull off. Grilled cheese is a fave.
Kabobs are great too. I prepare the veggies on their own skewers and the meat on a separate skewers. I have some shallow tupperware containers that store them well (and a rather large ice chest). But hey will also do ok in a large ziplock bag, but double up the bags in case a skewer pokes the bag. We grill it all and often stuff them in pita bread (rice is a huge pain while camping).
If you precook the fillings, quesadillas are pretty easy and yummy. We usually make chicken, but you could really do it with any meat or go vegetarian, my kids like it with zucchini.
We also like to make hobo dinners. They take a bit longer to cook, so we do those more often in the winter or fall. You take a large square of tin foil and place a hunk of ground beef in the middle. Wrap a few slices of bacon around it. Surround the meat with mini carrots and diced potato. My hubby loves to top his off with a huge amount of onion, the kids and I prefer it without. Top with salt and pepper. Wrap it up and place your tin foil package on the grill, cook until the meat is cooked through.
HTH!