Follow up: The van got stuck on Wednesday, March 8 about a half mile off road just north of Badwater. With park permission, a tow company pulled it out Friday afternoon with a small track vehicle.
It is illegal to drive off designated roads within Death Valley National Park. This driver has not yet been charged, but maximum possible penalty for this violation are 6 months in jail, $5,000 fine, and/or restitution charges for the cost of restoration work.
Restoration usually involves rakes or shovels to smooth the surface, then thoroughly soaking the area to encourage the salt to regrow.