Find the book "Trophy Blacktail Tactics" by Boyd Iverson, it's the bible on Blacktail hunting, it will greatly decrease your learning curve.
I've lived in Kitsap and on the Oregon coast, so I know what you're up against, here's a few things that I've learned.
Hunting the wet side is definitely a challenge. The bucks learn early in life that moving at night keeps them alive so it's uncommon to see them out in the day time. One thing that is common amongst most BT's that are killed, is that they are taken either in the first 15 minutes of day light or the last 15 minutes. They also tend to have fairly small home areas, this is the area they live in, so if you start finding good buck sign like rubs on the alders or shed antlers, it's likely that buck is fairly close by. Stalking them in their beds is an exercise in futility as you will either bump them with out seeing them or you will walk right by and not see them. If you can hunt them in the rut try the treestand and rattling method, much like hunting a whitetail. They also tend to move around more just after a big storm, particularly if it has been windy. Look for funnels to set up your stand, such as narrow strips of timber that has reprod or a swamp on one or two sides. The bucks like the cover of the timber and will move along just inside the edge. You can try still hunting them, but keep in mind my above advice. Get out scouting and good luck! There's a reason BT's are called the "ghost of the rainforest"!