>> When on the road when winter conditions are possible, I always include among the supplies those that make physiological needs answerable without exposing oneself to the elements.  <<

  Hell, I don't move the Westy in any climate without, um, containers-
2 quart Rubbermaid for overnight (I'm a beer drinker) and SWMBO has
her very own Port-a-Potti.

Geo/ATL