Short approach (1,200 ft). Variety of terrain to learn backcountry skiing. Option for mulit-day camping and skiing. Volcano views.
Park at Heather Meadows parking lot at Mount Baker Ski Resort and follow the Blueberry cat-track, which is actually a paved road in the summer, leading south up for 2 miles passing Austin Pass and continuing southwest on to Artist Point, gaining 1200 ft in elevation. From there, dig out your snow camping platform, pitch your tent, and then the rest of the day is left to explore. For a fun intermediate run that typically has the most powder, ski east from the saddle at Artist Point and drop into Swift Creek Basin. For a steeper, more challenging run, ski west from the saddle and drop into one of the Blueberry Chutes.
Dig snowpits to test the snowpack and ski/snowshoe the slopes that look appealing to you. Consider circumnavigating around Table Mountain and practice ripping skins off those skis as you transition between rolling terrain. With so many different angled slopes, you are bound to find variety. This can be done as a day trip or set up a basecamp for multiple days of exploring the backcountry.