SUMMARY: no side/frame damage
Just got a call from the shop. The damage was confined to the rear of the van. The grating/grinding of the side door was not anything bent; it was just dirt. My guess is that the collision must have knocked some stuff loose and into the door's track. So they cleaned it out and said it sounds fine now. Hallelujah!
They think they'll have it done next Wed or Thurs.
Asked the shop to give me a side estimate for the year-old driver-side door damage; as long as it's in there, might as well have that taken care of, too.