Not so sure about the Stevens Pass idea. I cross it and hike it quite a bit, and typically don't see that many deer there. One indication is the low number of deer hit along the highway way there as they migrate to and from their summer grounds. Plus lots of people have been in the area hiking to look at the colors. This up coming front should help move and locate them. You are right in the deer area , Chiwawa, little Wenatchee, etc where you can reach high deery elevations. The past warm weather and moon lit nights had them hunkered down is what I witnessed.