Have been on my own on a few wild camps, some in a tent, some under a tarp, and its never bothered me.
My first time in a hammock on my own, I must admit I did have a bit of a scare when about 2am, something hit my hanging straps, that woke me up with a start,
for some reason I shouted at the top of my voice at what ever did it and actually went back to sleep.
Next morning there were no obvious signs of what caused it.
But that hasn't stopped me going on my own, I quite like the solitude and listening to nature.