Also worth mentioning that there were a lot of crickets/grass hoppers when we were there and a little road noise (close to main road into Vienna).
I think there is another site on that website linked, but not been there.
Also note that now Vienna turned quite car unfriendly, so any car without a Vienna plate (and a parking license paid to the same district where you park) must pay per hour for parking in ANY public place . You need to download an App, fill up upfront some 20 Euros, and then pay a couple of Euros per hour. But you cannot stay more than 2 hours anyway. There are literally thousands of semi-policemen hunting you for that.
In alternative there are Parkhouses of course (but most limited to 2.1 or 2.0 meters tall) but they will cost you a fortune.
So if you get to a Camping place in.Vienna, let the van there and use the public transport, that is very convenient, safe and efficient. Or use/rent bikes/e-bikes/e-scooters. Vienna is almost all flat and dedicated cycling roads are growing eving day (at expense of regular car roads).
P.S. that camping is actually INSIDE Vienna.
That is 22nd district (aka Donaustadt), that is the biggest and most inhabited one, with plenty of industrial sites, so no surprise there are highways everywhere. It comprises most of the "new" Vienna, on the left bank of the Danube river. There are still huge amounts of green though. From that Camping you are close to the Donau river, place of one of the biggest city parks in Europe, stretching many Km both ways, with bridges connecting to the Prater one, forrests, ponds, lots of swimming , sailing/rowing places, FKK, etc.