Chris brings up a very good point. If you wake up wet and you need to go outside to change, it can be a deadly maneuver. You need to be organized and you need to be quick. I've gotten pretty good at changing inside my sleeping bag...at least partially.
This is can be where good shelters separate themselves from great shelters...purchased or man made.
Does anybody have the proper wiggies link? Chris's isn't right and I'm curious to read Jerry's thoughts.