There is abundant information about Northwest Native Americans using fire as a management tool to maintain productive environments, but none (that I know of) about NW Native Americans response to wildfire. The use of fire to encourage prairie habitat on the Olympic Peninsula is documented by M. Kat Anderson here. Zuckerberg notes the use of fire by natives in maintaining prairies/oak woodlands in the Puget Sound lowlands. William Fraser Tolmie, physician, furtrader and Chief factor at Fort Nisqually from 1833 to 1859 wrote of fires and smoke from Indian burning in Puget Sound prairies occurring very frequently. In Oregon the use of fire to maintain the Willamette prairies and along the Rogue and Umpqua Rivers of Oregon is provided by Robert Boyd here. Native burning in northern coastal California is documented by Kroeber and others. Burning that was done throughout the Northwest encouraged desirable plant and animal species but also protected villages from wildfire.

According to Zuckerberg, on occasion, these fires very likely caused wildfires. Naturally occurring wildfires that happened in the prehistoric period were caused by lightning. There were undoubtedly very large fires prehistorically. There exists a great summary of fire history on the Olympic Peninsula here. Note in the fire history above, that:

"Evidence indicates that much of the north, east and south sides of the Olympic Peninsula burned during episodes of major fires about 300-500 years ago. Fire scar analysis indicates that another cycle of prehistoric fires burned many east side watersheds about 250 years ago."

Those would have been a very large wildfire(s).

However, your question asks about "documentation from NA tribes", and I know of no oral histories (the only source available for documentation from prehistoric NW residents) from natives about wildfires.

Zuckerberg, Arthur 1991 The Natural History of Puget Sound Country, University of Washington Press.

Kroeber, Alfred 1970 Handbook of California Indians, University of California Press. (original 1926).

Tolmie, William Fraser (1963). The Journals of William Fraser Tolmie: Physician and Fur Trader. Mitchell Press.