Fondest memory: leaving the cairn we debated the best route back to the car park. Both my friends thought the road looked like it curved around and would circle back to where we started. After walking for a while I became pretty sure that we should follow advice I'd garnered on previous hillwalks - DON'T assume that paths circled back! Most trails lead from point to point, not in loops, so to return to starting point you must retrace your route. Walking in the hills without very good maps, a compass, and water is a very unwise thing! Finally convincing my friends of this we returned along the same route.