Test 2 - minus the color formatting

If you use quilts made with high FP down and thin shell material, 3-season quilts can be stuffed into the bottom of the pack without a stuff sack and the items above will naturally compress them. Some people use a trash compactor bag to keep them dry and others use an even better option which is the Nylofume bag, and some crazy people like me use nothing... I just stuff them straight into the bottom of the pack. Been doing that for about 15 years now with no problem. If the rest of your UL kit is dialed in nicely, a typical UL pack in the 36L to 50L range will be plenty big enough. For winter, I use a Zpacks Arc Haul (62L) and can easily accommodate at 0deg Incubator and 20deg Enigma, also with no stuff sacks, and plenty of room for other gear/food/clothing.