We know in hindsight that her body would have been found anyway, even if she was buried, and he may have too.
Setting that aside, the Hillside Stranglers left their victims where they could be found easily, and they planned in advance on killing them.
I know it was discussed before that if he wanted his victim found, he would have left her along the roadside, and I agreed, but, maybe if it was dark, he may have done just that but didn't want to be seen dragging her back to the roadside.
The Hillside Stranglers thought they were smart enough not to get caught, and were cocky, taunting LE, and maybe this guy is too.
Just a thought.
My thoughts are that he wanted those woods to go up in fire, destroying all of the DNA, so he didn't care about her being found, and was in a rush to get away.
He may have been smart enough to know that even if she was buried, he could have still left his DNA on her.
Still going with Sexual Sadist that had not only had rape in his plan, but murder too.