Considering an AT thru hike starting February 2020. I currently have a UGQ Zeppelin 20 full length underquilt but I'm wondering if this is worth switching out for a partial length underquilt with a few sections of Z Lite which would give me a go to ground option through the Smokies.

Note that I will be switching to a Hammock Gear Phoenix 40 partial length once the weather warms up so am already familiar/comfortable using a partial length.

Any advice is appreciated.