What is needed here for ease of use, and efficient baking / roasting /
slow cooking, is a tail pipe oven.

No need to burn any propane.

Plan the meal in the morning, drop into the oven, and drive to your
destination.

"Honey I'm Home", and the pot roast , turkey, meat loaf, whatever is
done and ready to be served.
Can't be beat for efficiency, and fuel savings.

RC