It does take time to work out how to best use a VBL. However, once you have it down, it's not only lite weight but also a life saver.

I've use a full VBL bag in my hammock. Takes a little effort to get in, but very doable. The Stephenson's Warmlite shirt, rain pants, plastic bags on feet work even better.

Of course, I'm always trying out new things to carry less and stay warm. Thanks for the report.