camp oven cookin

Hi All, 90% of recipies suggest 200c as the usual temp so I have always used the rough method of temp control, a large shovel of coals on the bottom and a level shovel of coals on top seems to be around this temprature, after 1/2 hour a small amount of coals will keep it at that temp, I would rather take an extra 1/2 hour to cook than burn the daylights out of it
cheers
Rabs
cheers
Rabs