Sport of Orienteering there is a term called "fight". This means while traversing a course or trail one encounters challenging terrain/water/brush. Based on your topo map and skill you decide which direction to take. If you choose shortcut through "fight" you could end up wading, climbing, etc. You are gassed physically vs choosing less "fight", etc. but if skilled and safe can shave time to get to control point. MD, if he indeed traversed the area we think he did, would have run into this "fight". Crossing over a marsh/brook twice, he would be, I think, clearly exhausted and under mental stress. Not to mention the conditions that night/early AM provided. Without sneakers and or shirt his body should show signs of cuts, scratches, abrasions, on his upper torso and feet. Wading through a marsh/underbrush would,I think, promote these type of marks regardless day or night. Autopsy should show this. If not, then something else possibly at play here based on where he ultimately came to rest and where some of his items were found or placed? IMO.