doc1911 wrote:I just got back a week ago. I had a -20F bag, VBL and liner and never slept in more than layer 1 until 17K Camp. This time of year you really don't need a -30F bag. Save some space and weight and go with a 0F or -10F bag and use a VBL and maybe a thermal liner.
I would not be so quick to dismiss the need for a bag warmer than -10F. And not everyone enjoys using a VBL. One should plan accordingly based their planned clothing options, tent style (single wall vs double wall), and on an average of historical temps as opposed to a single year's weather. Personally, while I did sleep with my -20 bag unzipped most nights, there were definitely 2 nights @ 17 where I was glad I had it in early June '06. My $0.02