Thinking as a weight weenie, I usually just larks head a long amsteel dog bone around my ankles, throw it over a sturdy limb, hoist myself up and tie it off to a short tree strap with a trail stick MSH. If it looks like rain, I'll jamb a Golite hiker's umbrella in at the amsteel/ankle junction. I find this system works well. An added benefit is that standard mummy bags take care of any insulation needs.
As a word of caution for those of you that like to experiment with variations of a method........I tried it once "head up", but found this to be most unsatisfactory.
gmcttr, thanks for a good laugh to close out the year!