We have used both also, DW still likes down in the trailer
, but bulk and weather isn't a problem in there.
Maybe you can start a what's in my back thread. Although 30 lbs is pretty good,
Best bet is to find things you can use for more than one chore like consider Duct Tape as a moleskin substitute, bandage wrap, gear repair (packs, boots, poles...), splint wrap, and more : or candles to use as a light for reading and the wax as fire starter