The smallpox blankets are a myth. Just part of a leftist fictional narrative. There was a pre-contact smallpox outbreak all over the pacific northwest, it was widespread in the Western North American Indian tribes at the time. Many Columbia Plateau tribes traveled west of the Rocky Mountains to seasonally hunt buffalo and brought it back. There was no slave trade out of Discovery Bay, no shipyard, just a lumber mill for export.

Just a few things that were written into history:

1770-1775 - Smallpox decimates 30% of the Pacific Northwest native population
1788 - Robert Gray sails to Vancouver Island and encounters Indians with smallpox scars, this is the first American exploration North of the Columbia
1792 - Vancouver's expedition encounters Indians with smallpox scars, this is the first British exploration of the Puget Sound area
1806 - Lewis and Clark encounter Indians with smallpox scars
1807 - British parliament bans the slave trade
1838 - First US Navy mission to the Puget Sound, the Wilkes expedition, anchors at Discovery Bay also known as PORT Discovery (not Fort).
1858 - Lumber Mill established at Discovery Bay, the first industry there that did not build ships but export lumber
1986 - Joe D'Amico, a former police officer, created "Fort Discovery" at Discovery Bay, a private sector military training camp