It amazes me how we all keep going round and round......gang, not a gang, JF, not JF, WC involved or not.
So this kind of makes me run back to my original theory.
Maybe she followed her new friend up PC to go for a motorcycle ride. They get up there, she parks, she walks from her car to the pavement where the bike is (one set of tracks). They planned to go on the dirt road but it was too muddy or gated so they decided to go back down for a road ride. He takes her to the missing crime scene. She witness something she wasn't supposed to or fights off some unwanted advances. Now they can't let her go. She is mouthy and says she will tell so he hits her etc. He goes out scouting on his bike for a place to dump the body, he doesn't want to wander around with a body, he checks out the CB location to see if the duck blind is still there, leaves tracks there in lower lot. Goes back for car/truck or boat and returns with body. Just a theory. I never did hear that anyone was reported to be walking out of PC and the time line seems so short for them to already be dumping that car, that's what leaves me to think she parked the car there herself. If it was premeditated I'm sure there are a lot better places to dump a car where it would not be reported so soon. Even if they left it in a parking lot in town, no one would have noticed it and reported it that fast.
I find holes in this even myself, but just wanted to throw it out there.