Lol if I had tens of thousands of people harassing me to see if I was alive or dead I'd probably want to disappear from social media too. Nobody really wants that much attention. Shit's weird but her ghosting the world at least has some plausibility to it.
I don't believe the missile theory but I have wondered how there is literally no part of the RV left anywhere. Like you said, where is the frame, engine, etc? Are we to believe this explosion could vaporize the entire thing leaving nothing but tiny pieces and absolutely nothing even remotely recognizable as an engine block or E-series frame? No crater or anything in the ground? I'm no expert but I would imagine an explosion that could disappear an entire RV would have done a hell of a lot more damage to the surrounding area. Something is definitely fucky here.
Facelift.