Down bags will loose their loft if you compress them. I just use the stuff sack it came with. I use a 38 liter pack and can get all my gear and 5 to 7 days worth of in it. I have quilts, an EE rev 20 and hammockgear burrow 0 and dont have any issue carrying it in a small pack. Maybe you should look at the other stuff you are carrying. Maybe ditch some stuff and get smaller gear