I hope I'm not de-railing your thread in posting this, but if you get the opportunity to rent or borrow a 4WD some time (Jeep/4Runner/Tacoma etc), there is some really cool backcountry in Death Valley. Except following a flood, Titus Canyon is do-able in any van.
But the most fun and beautiful parts of the park need something considerably smaller and more capable than a Sprinter.
Far steeper and slicker than it appears in the photos. All of us had to use momentum and the locking rear differential to make it
Eureka Dunes is accessible from the north, but I don't think most will try and get a Sprinter through Steel Pass for access to Tea Kettle Junction/Race Track. Terrawagen did it in their 4x4, but they incurred rocker body damage. And they had to rely on momentum to make it as the Sprinter low range isn't very low.
Two of the three times I've driven Saline Valley Road, the washboard was awful. At 5 MPH it was unbearable. I would throw it in 4wd and accelerate up to about 50 MPH, where it would smooth out. I can't imagine how miserable that would have been in my leaf-sprung van. But again, it hadn't been graded prior to my visit. At times that road is okay.
Darwin Falls, Uhehebe Crater, Titus Canyon, Scotty's Castle, Devil's Golfcourse, Ballarat, Badwater, Artist's Drive, Charcoal Kilns, Dante's View...some of the more known parts of the park can all be seen in a van.
My favorite though, Pleasant Canyon, definitely not. Goler Wash/Mengel Pass through Warm Springs Canyon....I dunno. Maybe? You'd have to count on momentum and possibility of body damage. There are certain trips where giving up the comfort of the van is worth the places I can access with the 4Runner. Also, it will fly over terrain that the van just bounces and rocks over.
I would encourage anyone that has not been to DV, to go. Just stay away during the hot season, haha.