I always have a problem when someone wants a "vegetarian" recipe because there are different kinds/degrees of vegetarianism which have different restrictions on what they consider to be vegetarian
One thing you could make is an okra gumbo served over rice ... make a dark roux, add diced onions and green bell peppers, then okra (fresh or canned) and diced tomatoes (fresh or canned) with some cajun seasoning. If your form of vegetarianism allows shellfish - you can add some dehydrated/dried shrimp (available in probably any asian market).
Red beans and rice.
Black-eyed peas over dutch-oven cornbread.
Garlic broccoli over pasta ... mince some garlic and add it to a skillet of cold EVOO - bring it up to temp where you see bubbles coming up from the edges of the garlic and cover and remove from the heat to allow it to steep for about 30 minutes. Then, put it back on the heat until the oil is hot - add some diced onion and sliced mushrooms - sauté - then add broccoli florets and cook to a mush ... add more EVOO to make it creamy ... serve over linguine or fettuccine.
Pasta and Squash ... cut some zucchini and yellow squash in half (lengthwise) then slice about 1/4-inch thick ... sauté in EVOO with onion and garlic - then add drained diced tomatoes and Italian herbs (like oregano) ... serve over linguine or fettuccine.
There is always Pasta e Fagioli
(pasta with beans) - you can weed through the recipes to find one that sounds good to you.
If your form of vegetarianism allows fish - salmon or mackerel croquets from canned fish, if it allows chicken then you could go with chicken and dumplings from canned chicken.
What would you cook at home on your stovetop using ingredients that would not be refrigerated for 5-6 days? That's what you can cook on a campout. If your camp-site has the ability to use a dutch-oven for baking (a real wood fire where you can place coals on the top and under the bottom of the DO), that expands your capabilites.