In the early season an ice ax is useful in attaining the ridge. Otherwise, good approach shoes will suffice for the ascent/descent.
This is a very efficient and direct way to climb Wilson Peak. Suprisingly, I have never seen it mentioned in any guidebook, and have never seen anyone on it while skiing or climbing in the area. It is an attractive alternative to the trade route for those comfortable with 4th class scrambling on the scale of Mt. Wilson or Gladstone Peak.
Of course, you can also use the west-nortwest basin to reach the Southwest Ridge proper and follow that to the summit. This is about the same difficulty as the Northwest Ridge.