Yes, the frost caves have tons of resources. You want to break everything in there. Most peeps miss most of the hair as they don't go to all the rooms, don't jump across the well downwards to find even more rooms further back, they miss all kinds of stuff, usually 3-6 alters all with resources, little rags in doorways are red material, bones on the floor turn into entrails. It is easy to get lost in the caves and most take 2-3 in-game days to complete. I always build a little shed right outside the door with a chest to put all the loot in so can portal home and sleep when half through. And I drop a pc of wood in a doorway of a completed area as they do begin to look the same. Destroying doors and braziers as I leave an area helps to see they are done too.
Granted, it is rng but there's way more in them than seems at first.