As someone noted upthread, around August 26, BL's insta is very different - shows him wandering around, eating melons, with the camera apparently propped somewhere or on a very short tripod. Or at least, it did have that (can't find it now). It definitely looked like it could be Wyoming in the background.
I am not ready to ponder whether anyone moved her body - I am trying to hope that someone saw her somewhere between Grand Teton and where ever the van is on the days that BL was a solo actor in the videos.
It would also seem to me that if BL was in fact driving around with a body in the van, there will be some evidence.
Looks like his Insta is now private. I bet someone here took a screenshot, though.