You don't really have to do anything to a WSM.
You CAN put a pot base or sand in the water pan. I drilled a 1 inch hole into the base of mine and welded in a 1 inch nipple that I attached a ball valve to for optimal air control and to make it easier to hook an IQue to.
If you aren't adding water to the pan you don't really need the door. In that case I've taped over the door seam with foil hvac tape to help ensure it's sealed.
If you're cooking in cold cold windy weather you can create a blanket using a welder blanket or a sheet of Reflectex material that you can wrap around and bungie around the top to create a teepee which will block the wind and create a significant thermal shield.
Thats just a few. Of course you can build carts, attach a table to the side, put it on wheels...
Neil -- "Easy Bake Master"
NB Bandera [gone to heaven...conveniently located in Long Island, NY]
Rebel 23, WSM A, WSM B, UDS, Easy Bake Oven
Pork Pistols BBQ
MOINK...It's what's for linner.