I see it this way. If a private campground has various levels of sites (not size, levels) and you reserve a premium site. Expect to get put into one of the premium sites, but expect it to be the smaller of the section, not the 65'+ pullthrough 15 steps from the pool, instead you will get the 35' pullthrough 60 steps from the pool.
That is how I see the levels/classes of sites working. When I had the pusher I remember getting Jellystone red carpet site, since I was with 2 larger 5th wheels and not towing a car, they asked to put me into a 40' pull through next to the larger two rigs. I had no issue with it as I did not need the space.
Now had I been say a 30' rig and they tried to move me from a red carpet site to a full hookup even through I reserved the red carpet site. It would have been a whole different ball game. space or not.