by shed I believe he meant the warehouse in back of the park.
As for the flats, most of them have their vehicles removed and put in the warehouse, and the rest is just left there outside (some parts of some rides do get some plastic)
Favorite Wood Coasters: The Voyage, Ravine Flyer II, Thunderhead, Balder
Favorite Steel: Voltron Nevera, Steel Vengeance, Expedition GeForce, Olympia Looping
Parks visited: 232, Coasters Ridden: Steel: 894, Wood: 179, Total: 1073