Sleeping under stars is in principle a great thing, especially with a lasting heat period as we have it now. But sleeping under a full moon is more like sleeping in a soccer park with the floodlights on. Still cool, but not much sleep. The hikes the evening before and in the following morning were great. This must be my favorite little corner of the engelberg alps, the long ridge from Stanserhorn to Rotsandnollen. You get everything from an easy hike to T5 climbs.