Really depends how far you want to go beyond your 'meat and potato' cuisine. And how many people you are going to feed. Basics would be a couple frying pans (skillets). If you're only feeding 2-4 people, get a 10 and 12 inch skillet to start, . If you want a cover, get one for the 10 inch. If you need to feed more people, I'd add the 13 or 15 inch skillet.
I have the three burner 426B Coleman (I'm moving over to a larger 3 burner propane setup), and use a couple 12 inch CI skillets and a reversible CI grill/griddle. The griddle is great for pancakes, French toast, frying/scrambling lots of eggs (if your stove is level, or doing a mess of hash browns). Flip it over to the grill side, and use it for steaks, chops, burgers, etc. For skillet covers, I just use aluminum foil.
A dutch oven is wonderful for deep frying, baked beans, or chili. It's a neccessity for making campground peach cobbler.
When I camp, I will normally do a lot of the food prep work at home. Doing this helps keep the camp garbage down, helps with food safety, and frees up time at camp. It also is a great way to get other's involved in camp cooking. One of my favorite 'first night' camp meals is cheese steak sandwiches. I buy the meat already shaved and frozen, cut up the onions and peppers at home and pack in a ziplock freezer bag. Cheese is pre-sliced and pre-packaged. A little oil in the skillets, saute the veggies in one, and the meat in the other. When done, ring the dinner bell and everyone makes there own. After a long day 'running', it takes very little time to get hot food on the table.