From reading the forum when this comes up it seems the RV'ers from California and the western states that claim many CG's can't accomodate them including their state parks.
I personally have never seen it east of the Mississippi. If you can maneuver it in all the ones I've stayed they will have a site for you.
And actually over the years the CG's I frequent every year as I travel have taken many of their sites and combined 2 to make a pull thru for the big coaches since so many are now towing a toad.
So I think it's more of a west coast issue and limited to the national and state parks and smaller CC's tucked into the woods/mountains. All the resorts I called in the foothills said they accommodate larger rigs.
Buy the biggest one you can afford and enjoy!!