Actually, I believe that the Hawaiian influence in the NW dates to the
historical period, when Hawaiians (called O-wy-ees, etc., not sure of this
spelling) were brought to the NW on European ships as crewmembers and as
laborers, etc. I believe it's debated whether the Chinook trade language
predates European trading, but it's clear that some of the influences in
Chinook as it was recorded are from the historical period.