I grew up with woods and fallow fields all around, used to walk about a mile to grammar school through the woods (when it was dry, otherwise I'd take the road) and seldom felt any sort of malevolence. Even as a teenager I used to cut through the woods and usually did not feel spooky, but I would also carry a knife and pick up a few potato-sized rocks just in case...
These days the only time I really feel on edge when camping is when the kids are with me right around sunset. I have to remember my breathing etc, just turn off my brain, follow my breath and really dial in my awareness. If the feeling persists I stay on high alert, if it fades I relax a bit. Almost always it fades pretty quickly under close scrutiny - maybe a hint of what an agoraphobic feels? Is very nice to have the dog along.