It's not always possible, or pleasant to lie down first to test, if it's a bit wet or mucky. Walking it with baby footsteps gives you a good idea of levels - especially if you've developed your spidey/ yogi sense of weight balance in your feet. Depends on how you sleep too, most side sleepers have a favoured side - if I have to be on a slope Id rather have legs and arms on the down-hill side. Doesn't totally prevent the 'falling off a cliff' dreams altogether, but it can help a bit. In extremis I have used my pack under the long mat edge, to give a more cradle like effect, or at head end. Twos up, we often sleep head to toe.. Legs uphill helps prevent restless legs for him apparently. Usually scoping for a 'perfect pitch' anything up to an hour before stopping in unknown terrain. It's reassuring to have a default banked to return to, if what lies ahead is unsuitable. Although, its rarely necessary to have to retrace that far. I reckon we should get points for finding this pitch though. https://www.instagram.com/p/BnnrRtFlwOB/?utm_source=ig_share_sheet&igshid=pulhobbk6imv In the mist, in an endless sea of boulders at the end of a looong day. Any smaller and it would have been a case of rolling up in the fly sheet as an impromptu bivvi.