Bobert, it's not a floating slab, and it's water tight. No drain as far as I know.

As for water, it's quite a challenge. For a while we could use the old water tank with a garden hose attached. As soon as we were able to get a generator, we used it to pump water from the tank into the camper's tank. Now that the hose and tank are frozen, we are stuck buying water and filling containers when we are able to. We carry out wash water in a bucket. The rented portable toilet is expensive, but makes it possible to stay here.