Set limit to dryskins to 20-30 it should be enough and you do not have to manually set anything. The game prioritize dryskins becuase they are more important in early-mid game - you need them for building, repairs and winter clothes while leather is rather optional luxury just for summer clothes which is not needed or transportation. While in late game dryskin is only useful for totems and their upkeep so when you enter late game with wool clothes and mud/straw buildings, linen bows/fishing rods feel free to lower dryskin limit to 10-15. I have noticed that raw skins are first brought to dry skin rack and than to tannery, if you have too many racks, than it is possible that all raw skins end drying.
Post edited March 14, 2019 by jwinter90