Early man would have managed the forestry. There are papers on forest pastures in ancient times.
Charcoal was a vital economic product for the woodland around the lochs several centuries ago.. and would have reached a height when the Iron Furnaces were developed, first at GlenKinglass, and then Bonawe, Taynuilt in the latter part of the 1700's.
Doogan, Brian(2004) A social and economic history of the Blackmount Deer Forest, Argyllshire, 1815-1900. PhD thesis. 404 pages This paper has great insight to the running and even some of the names of people involved in the forestry of the Blackmount Forestry.
In the 1900's forestry was once again an important part of our local land use.
Much of that planted is currently being felled; the changes in our landscape are profound, if temporary as ground is re-planted.