I am growing sick of tanning tubs and drying racks littering my area, It is much too much a chore to refill them individually so here's my suggestion.
Tanning huts.. Tanning huts could work similar to how the inventory of wagons do, only they require 10 tanning tubs to create (plus other materials for construction) They would collectively allow for a total of 40 spaces for dried leather to be cured into leather.
They would operate as drying racks as well containing many types of fresh skins.. Instead of refilling each individual tanning tub on the ground we could instead, fill the tanning hut with bark and water..
To justify such a simplified method it should require another skill to construct.