I do believe you are doing a thru hike next year, and I am too. My biggest concern is the first leg of the hike from Springer through the Smokies. I plan on sleeping in a pair of patagonia cap 3 pants and top. Under the pants I plan on wearing some good running tights. On top of the cap 3 top I have a decent 13 oz. down jacket that I will sleep in if necessary. On my feet I have some heavyweight REI wool socks, and a wool cap for my head. This all goes with my potomac underquilt, and homemade top quilt with the same loft as the underquilt. It sounds like a lot, but I don't want to get caught in zero degree weather on the ridgelines of the Smokies unprepared.