The RV requires practice. You will need to monitor the muffins. You will need to presume that the first attempt will not be good. The size of the oven matters. A smaller one will be more unwieldy but if it's a bigger one in a larger RV it will be closer to a home unit. I like to have a thermometer in the oven as the temp scale is not precise.
For muffins, make sure it's on the rack as it will burn on the surface of the oven over the flame. If the recipe calls for 25 minutes, check it at 15 and 20.
The result of the muffins will also depend on how good your muffins are when you make 'em at home.
