Depends upon how many people you are cooking for.
For two or three people, a 4 Qt Texsport Dutch Oven is just right. It has a rimmed lid for keeping the coals on top and a decent handle and legs. I cook biscuits and cornbread in it and it does well. I don't cook much else in it. Sometimes after dinner, my daughter would want a snack and she would whip up a batch of biscuits and cook them in the dutch oven over the fire and have buttered biscuits and jelly before going to bed.
For a skillet, you should have a couple of sizes. I have no brand preference except do not get one with a wooden "roller" handle because it will spill stuff all the time.
The key to clean up is to follow direction for getting it broken in and coated. After that don't let your wife anywhere near it or she will get it "Too Clean".