Speculation indeed. That's what we all do
It's possible BG knew nothing of the area. Maybe he stumbled upon it by accident one day, or saw it on google earth, or heard about it from a friend, thereby choosing it as a good location for a double murder. LE has stated repeatedly that for the average person passing through, they'd never know the area existed.
Don't you think it risky, with murder your intention, to order two girls down a hill you'd never been down before? But who's to say he was concerned with risk.
Not to mention LE states there was lots of evidence found at the scene. I'm not sure what that means, but I've always thought it to be a clue that this guy had brought some things along with him, or had placed some things at the CS prior to the murders.
And once down that hill, then through the woods towards the creek. I can imagine not being through those woods before, not knowing where he was going with them. But I find it highly unlikely. In the heat of the moment, why not just murder them right then and there? Why cross the creek? Maybe the girls, running from him, led him that way?
And once across the surprise creek, coming upon it where the water was shallow, emerging on the other side, the killer not knowing where he is, two girls ahead, or in tow, then killing them, in the bottom land, at a random spot, amongst the trees, close to a path that leads right up to that cemetery.
Then by chance hoping not to be discovered, and not knowing the woods, having to return by the path which you took on the way in, back across the creek, up that hill, across that bridge, and down the very same trail?
All in about an hour's worth of time? That snapchat photo posted at 2:07, with Libby's dad arriving around 3:15 to pick them up.
So swift were the murders. From the bridge to the CS and escaped within an hour and 8 minutes.
Sorry, at this point in time, I can't believe the guy didn't know his way around.
I think he knew the area very well. I think he played there as a kid, or drank/partied there as a teen, or hunted there as a teen/young adult. I think he knows who RL is. I think he was familiar with RL's land, with the trails, with the bridge, with the entire area.
I think he parked at that cemetery. Went down the hill toward the CS to check it out, make sure it was secure. Then to a perch to watch for his victim(s). Then follow them across bridge, down the hill, across the creek, commit the crime, and simply walk out of there to his car in the cemetery, and take a few country roads out of there, never being seen.
All speculation