If I still lived in Snohomish County, I would hunt 437 and 448 hard. Lots of public lands, probably a lot of gates so hike in would be great to keep crowd down to only dedicated peoples. My old neighbor in Lake Stevens had a stack of skull capped Blacktails in his living room from those two units. He would focus on cuts that were fresh up to 3-4 years old so he could see deer. Of course, he was a timber estimator so he was always in the woods and knew which areas had fresh logging activity. Either way, get out there, get on fresh sign, hike in, and enjoy the blacktail rut! Good Luck!