I am taking a trip in late February. We will be camping two nights in the George Washington National Forest in WV, near the WV/VA line. I expect the lows to be around 15-20 at max, and hopefully around 5-10 higher then that.
I have a Kookabay R5 pad on the way, and I plan to take my Z-Lite underneath, which is R2. I have a Montbell #5, 40 degree bag. I also have good layers including a down jacket I can wear.
My question is...Do you all think I will be ok with this setup? Or alternatively should I carry along a 2nd 30 degree synthetic bag I have, and double bag up? Carrying the 2nd bag adds 2lbs to my base weight, which pushes me from about 9lbs to 11lbs base. I am just wondering if the combined R value of 7 along with good layers in the Montbell bag will be enough or not.