I just ran into a 3 season hennessey shelter (very reasonable). it includes the pad and under cover, no top cover. only bought because price was right. my question is i have a nest now, good for me to about 40 degrees by itself. was wondering if i use this under the nest what temp would i be able to get to. has any body tried this? i have a blue pad that i use with nest that will get me to 20 degrees using pad in hammock and nest under hammock. i would be okay with this set up but part of my dilemna is i use a packa and granite gear ozone pack with pad straped to back of pack.this makes the packa a very tight fit to walk in. my thinking was if i use the hennessey 3 season shelter it would be in a smaller pack that would fit in my pack. also i may not need the pad that they supply with the system if just the under cover under the nest would bring me to 20 degree temp range. i'm doing my thru starting march 27, 2007 and trying to figure my best set up like all others hoping to hang from geogia to maine!!