With that thought in mind, rather than a quilt, consider one of the Big Agnes sleeping bags.
Quote:
...Underside insulation has been eliminated and replaced with a sleeve for a Big Agnes 20 in. wide rectangular pad (sold separately)...

If the ground is as damp as I have experienced in the WA & OR Cascades, you will definitely want a pad. With the Big Agnes set-up, you won't wander off the pad.