Thanks for all the ideas and suggestions. For simplicity's sake (and after reading through many of your ideas), I am thinking about just having the two:
JRB No Sniveller (Long) for temps over 40 deg F
WM Alpinlite (Long) for temps between 10-40 deg F
Combining the two for temps below 10 deg F
The weight of both would be about 58 ounces–6 ounces more than the EMS Mountain 0–NOT ultralite, and maybe not even lightweight, and yet offers the simplicity of only keeping up with two sleepings.
What are your thoughts on this? I have created the backing for the Sniveller that would make this do-able.
Here are two pictures: One comparing the EMS with the Alpinlite inside the Sniveller and the second is the underside of the Sniveller.
