Recent innovations in synthetic insulation simplifies quilt making. Climashield Apex is available in layers that do not need any additional sewing to stabilize it. The only sewing needed is around the perimeter. The end result with newer light weight nylon is an easily compressible, warm quilt suitable for damp conditions. I bought one from Mountain Laurel Designs two years ago for sea kayak touring but have found it just as useful for bikepacking. My original down Nunatak Arc Alpinist quilt is a bit lighter, warmer and more compact as you would expect. The MLD Spirit Apex quilt is narrowing the gap.

Thru Hiker has the materials for such a quilt.