How many people are using VBL while in the backcountry? I know the two main purpose of a VBL is one to prevent moisture from affecting the down insulation and two to create a micro climate that is warmer than without a VBL. My concern is excessive sweat and stink. I always stink enough by the end of a trip, I don't need an extra layer of smell!

Also what's peoples thoughts about using a VBL with a quilt? What about a VBL as a emergency Bivy for day hikes??

Thanks for you time and opinions!