Bend, OR, has doubled in size during the last twenty years to 100k, but I am not sure that is sizeable enough to warrant extending the season - early or late (now). Most have moved to the semi-desert of Oregon for lifestyle reasons and likely have passes of some type.
Although close to Portland, Salem, and Eugene, these urban skiers are less likely to make the 3-3.5 hour trek. Despite record snowfall statistics, few Seattle skiers are willing to drive 2.5 hours to Mt. Baker.
Crystal Mt. is the only NW ski area willing to extend the ski season if there is good snowfall. Mt. Hood Meadows will go until mid-May. Timberline is its own animal.
The Northwest does not offer great early-season skiing. It's almost entirely weather/snowline dependent, and few NW USA resorts have invested in decent snowmaking. The exception might be Whistler, but they do not use its system to open early. You simply do not get a lot of cold dry air.
Almost all the capital $ went to HS lifts in the 90s/00s in the NW.