If you make that workshop hammock too comfortable you are going to have to change the name from workshop to Gresh's nap shack cause there ain't going be no work being done. haha
For an indoor UQ I'd just do a gathered end fleece UQ. If 1 layer is not warm enough double it. I'd stay away from IX or CCF or anything non breathable. The last thing I want to do is wakeup from a nap and have a sweatly back. my .02
May your mileage in the backcountry exceed your post count.