Originally Posted by Mr Havercamp
The only Federal owned campground that does not allow soft sides @ Yellowstone is Fishing Bridge "RV Park" and it does not have anything to do with bears despite what the contractor . . .
This like almost all absolute statements is false. The NPs and some state parks react to current wildlife conditions. I have seen NPs and SP here (in CO) temporarily ban soft sided camping and tent camping based solely on wildlife activity. A case in point was Glacier's St. Mary campground was closed to soft sides in 2013.
There are of course some misinterpretations and poor wording that result in people thinking soft sides are banned. Jenny Lake in the Grand Tetons is one such where pop-ups are banned, but so are hard sides because it is tents only.
And, you can camp in a hybrid at Yellowstone's Fishing Bridge campground, BUT you cannot open the soft sides. There were several camping there this year when we visited that remained closed up. It just depends how much you want full hookups. They do try to point you to other campgrounds, though.