its my opinion, -- but i'd carry a 1/4" torso pad, and use that on the ground. lightweight, but could be used infinitely.
esp. if you plan to also use a UQ. i'd get a 3/4 quilt, and use the pad to equal out the weight vs. full length quilt. it should keep you warm enough on the ground, and add insulation if needed to the quilt.
my pack uses the folded gg torso pad as a backpanel... then i use it to sit around camp, fan the fire, windscreen, add insulation to the UQ, as a footpad for my phoenix UQ, cover the vitals on the ground,