These are really not Campgrounds, but RV Parks. A place to park, have electric, water, etc. You can find both kinds, just depending what one wants to do.....
We normally do not stay at these RV Parks, but if nothing else is around we have. Not having a firering is the least of why I'd do not care for them.
To Each His Own.
Haven't used mid-west campgrounds or RV Parks to be able to commit on them, just added my two cents worth from my observations of the photo of the RV Park mentioned. However, I do not believe this RV Park in MN would NOT have firerings either. http://stpauleastrvpark.com/Photos.html
Nor, this one near Kansas City. http://www.campusrv.com/photos.html
Nor, this one near Ames, Iowa. http://www.iowasbestburgercafe.com/camping/
I believe I could find many more RV Parks in the Mid-West which appear to not have firerings.