Thanks, guys.
The momentary movements are a big problem because they exacerbate my injuries. It's me, not the van, that I am trying to protect.
Westend, thank you for asking. I still in the same location, still cannot drive and now cannot ride as a passenger, due to worse injuries from the last round of gusty winds. I have booked a whole row of plane seats, and will try to find a safe enough position and fly home. I have someone coming to get my van and cat.
I am very, very, anxious about whether doing this will make things worse. The other option I considered was renting an apartment here in the middle of nowhere and staying for another month or so...