Agree. It has been reported by locals that that is how folks bypass the front gate of the park and get to the common area after hours. You can see that there is an opening from the main road that is wide enough for a vehicle that leads to the truck tracks. What those pictures irrefutably tell me is that either she was going to the common area or someone else was taking her truck there to dispose of it. The reason this is indisputable, in my view, from those pictures, is that it is obvious now that WHOMEVER was driving that truck was going to that specific place INTENTIONALLY, and was not just "drunk and lost". So, that adds another possibility for us -
She was driving when she got stuck.
She got out, walked, and made it to the common area.
Someone she met there did something to her and then put her into the lake.
That scenario is a bit far fetched unless her phone gives evidence supporting it. Otherwise, theory 1 prevails. I do NOT believe after seeing those pictures that she just wandered off drunkenly and fell into the river. Because IF she was driving that truck, she was CLEARLY aware enough of her surroundings to INTENTIONALLY drive to that location. And signal to turn too, FWIW.
JMO, of course.