No crowds, deep stashes, and long tree runs.
Limited terrain for experts, few steeps.
I spent last winter at Brundage on a wimb and I am very glad I made that choice. In the 53 days I skied I saw few crowds and was able to get up the mountain very quickly. On the mountain there are a lot of areas that hold powder far after stroms have past. If the snow is tracked out there is a good hike along the ridge that offers about 300+ acres of out-of-bounds steeps. Although most steeps are limited to about 100-200 feet. Hidden Valley offers a wide range of challenging terrain with no groomed runs, on weekdays you migh be one of only a few to ride the area all day. To get any good cliffs or chutes, you need to hike the ridge after chair 1. If you do this you might find some huge stashes of deep powder leading to 10-20 foot drops. With no resorts on the mountain Brundage is a throw-back to true northwestern mountain skiing. The town of McCall is a perfect mix of winter resort and small town idaho, most "tourist" come from boise, which makes the town still feel local. Nightlife is lacking (no women) but there are some chill bars where you can meet other skiers and share stories. And the christian services provide free taxi rides home from the bars.