The cooking space in a camper or RV is somewhat minimal. That is why it pays to figure out how to cook in smaller spaces. A microwave or halogen oven will cut down on the heat your cooking generates, and offer you a way to prep a meal in a minimum amount of space.
If you really like to bake properly, then you should seriously consider a halogen oven. You get the browning effect you do in a conventional oven while using less energy; the food also cooks faster. With an extension ring, you can fit just about anything into your countertop oven. Best of all, you can put it away when you are done eating.