I camped somewhere on this slope in 1974 when we did a complete traverse of Evans with full backpacks. We started at the Scott Gomer Creek trailhead (then known as the Abyss Lake Trail) and got picked up several miles below Chicago Lakes two days later. An amazing (and dumb) trip.
And I think it was in 1993, two weeks after appendix surgery I walked the plateau area to the Epaulet and Rosalie summits. Nice area!
Good route picture!