Ok, a question, if you can bake the bread in the oven on just a layer of flour to stop it sticking, why can't you let the dough rise in there too?
Then simply move the oven closer to the fire when the dough is ready?
You can, and I do.
As long as the dough does not press against the sides and top of the oven as it swells in size you'll be fine. But I would also give the dough a nice coating of oil and a dusting of polenta - especially lots on the bottom to stop it sticking then burning when you do put it nearer the fire. Polenta is IMHO better than flour for this job as it has much larger grains and does not got soft/mushy that easily with the presence of a little oil. Also - without it congealing it helps it be non-stick.
LBL