>>2459094I do the same with my quilt. It's some slippery nylon material, you have to have some kind of compression sack to control it's shape.
In my case it goes all into the backpack, but i could see me strap it to an external frame if i had one.
Most times i don't even use a sleeping bag or quilt, but this black poncho liner under my stuff. Seems to be good enough for late sping, summer and early fall.