Yes you do not need to hide away in the wild places of Scotland my comments were in general terms for wild camping.
I still like to be unseen it never ceases to surprise me who or what just comes bimbling along near your site.I was on Peddars Way recently and had two dog foxes close by barking at each other and then a Muntjac deer inspecting my site.
Think as if you are on the run; Eat before looking for camp site then walk on to find a secluded well hidden spot just before dark. Cooking and general chores make givaway noise and lights.You just need something about a few metres square away from paths; stock; dog walkers; farmers on sheep tending duties,and nearby house. Get up early and seek out a nice spot to have breakfast.
I prefer woodland but that is not always possible.The night before or In the morning I look on the map for some woodland about 15 miles ahead for possible wild camp; even venturing a bit off route and check it out when I get there
As PC says there is the body gives off lots of moisture which is more than likely to get trapped; hence the need for bag (or quilts) and bivvy side zips to be able to control conditions during the night.
+1 for the running shoes. Running stores often have more knowledgeable staff.Training in your gear is important, being problem free in that will give you confidence.
Some years ago I ran the Crosses walk in North Yorkshire, finished the 56mls in 13 hrs. I was in marathon training at the time and ran the first 33 miles then walked as I joined someone else who knew the way and I had lost sight of any one else. I ran the last few miles to make last orders at the pub and ran so much as I didn't fancy walking during the night and getting lost.My run was in running shoes and I recall going through lots of heather,some brambles and bracken.
The support points were fantastic with food, soup, all manner of drinks; enforcing the point about keeping energy levels and hydration up.When these become low spirits will become low and you may stop altogether.