I love your story, Larrison!
Yes, camping solo is safe. Many of us women do it, too. If we can, you can. Just follow good common-sense rules. I'm not as adventurous as Larrison though. While I love to camp in isolated areas when I'm with other people, I'm hesitant to do it solo. I gravitate to busier campgrounds where help is a loud scream away. However, I have never seen or been aware of any situation where someone needed help. I'm sure it happens but it's pretty rare.
I also prefer camping when road-tripping, whether solo or with others, but especially when I'm solo. For much the same reasons as Larrison. There's nothing more depressing than a hotel room alone at night, imho. However, at a campground, I can pitch my tent, talk to my neighbors, take a walk around the campground and strike up conversations with other people. Not only is the feeling of community nice, but it's a good way to stretch your legs after a day of driving.
Larrison's story reminds me of my own Twilight Zone moment. Let's just say that if you're in an isolated area, staying up late reading when everybody else has already crawled into bed, make sure you have alternative lighting besides the propane lantern handy. When the propane lantern dies on you and you don't have another light handy, and you've been reading Stephen King's "The Girl Who Loved Tom Gordon" that is about a creepy bear-like monster in the woods, and the pitch-dark blackness is so dark you can't even find the tent much less the zipper so you can crawl in and the natural sounds of the forest sound much louder than normal....well, things can become intensely scary pretty dang quick!