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.
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.
Pitches 1 and 2 can be linked with a 60 or 70. The bolted anchor mentioned as the belay for P1 is actually a belay for Edgehogs. Just keep climbing til you get to the ledges mentioned as the belay for P2.
My version of P2 (P3 above) takes a bomber #2 at the chimney exit, just make sure you extend the placement or the drag will be bad...