Ahh, the nankoweep ledge portion is tame compared to the non technical non climbing gear 'climbing'/scrambling of other noted off trail "climber's"/backpacker's routes. There were others long before Atwood and Rudlow who are noted for their awesome 700 mile? GC Traverse who did GC ledge routes some with quite a bit of exposure should any mistake occur making the 'hike' fatal. But read here: https://backpackinglight.com/grand-c...-rim-traverse/ There was a nice write up in the HMG blog with more details and pics of this GC Traverse. I would have loved loved to have been along!