Approach
The turnoff to the Lunch Rock trail is more like 2-3 minutes from the trailhead. It is currently marked by a signpost with a carabiner.
Descent
The N Gully descent is a more direct route to the base of the climb and to N Face trail that accesses the upper parking area. From the summit stay left, aiming for the gully behind the NE Buttress (note: there were ~no cairns when we did this in May). The top of the gully is marked by a prominent saddle. Once down contour around the base of the NE Buttress to your pack(s) and/or the N Face trail. Overview map here.