Were undecided between Traitors Cove or Kayaking the Tatoosh Islands.
I am visiting in late August and had the same question of the chances of seeing bears.
While researching I found this Photograph of a Bear at Traitors Cove. It's dated September 10th!
The bear also looks very fat being so late in the year.
Traitors cove entrance has the best halibut fishing I ever experienced. I don't believe it is on the mainland so any bears will be black and I'd guess sightings would be rare unless they are foraging the streams during salmon runs.