Here’s an annex floor that makes great sense when camping. The problem with a poly tarp (plastic tarpaulin) as a floor covering, is it collects dirt which is then transported into the sleeping areas of the tent or camper making for regular cleaning or sweeping. Then if kids come in from playing with sand on their feet, the poly tarp is about to get punnished again.  In situations where the ground is damp or soggy, an impervious floor covering over…