In my opinion, the real value of baking on a stone surface is to have the stone preheated in the oven for about half an hour, then transfer your bread to the hot stone to bake. The bread gets an impressive oven spring or extra rise from the heat of the stone and the porous stone promotes a really great crust by removing moisture from the bread while it is baking.
There is more than one way to get the dough onto the hot stone - safely! When I make hearth breads, I often shape the dough into a round or oval and put it on a sheet of parchment paper to rise covered by a clean kitchen towel. Then by using a pizza peel or a cookie sheet without sides, I slide the dough on the paper onto the stone. When baking a pizza, I sprinkle a lot of cornmeal on the pizza peel, lay the pizza crust on top of the cornmeal on the peel, put on my toppings, quickly, then transfer the pizza onto the hot stone with a smooth jerk movement of the peel. Another way is to rise the dough in a cloth lined basket and when ready to bake, just carefully tip the dough out of the basket onto the hot stone.
If baking in pans, preheating the stone for a long time (30-45 minutes) will still provide that burst of heat for a good oven spring if you set your metal pans on top of the hot stone. I would not set glass baking pans on the hot stone under any circumstances.
Hope this helps!