We stayed at a KOA south of Louisville on the way to our destination.
They had the brass to charge 51.00 for a site that would not be a
bargain at 10.00.
The first site they tried to lead us into was so tight it would have
scraped the paint on the trees.
The site we finally got into was nowhere near level and almost as
narrow. It was gravel or really lime dust and so short that we were
concerned that we should disconnect the toad. The requisite picnic table
 would probably put splinters in your behind if you could manage to
clean the surfaces and it did not fall apart. They haven't seen
sandpaper or paint or any maintenance in in many years. We could not
extend our awning but did have room to extend the rooms.
We would have passed it up except it was late and we were tired.
Over the last few years we have found most of the KOAs to be in a
similar situation. Small sites, sometimes too small and not wide enough,
crowed by trees and mud holes or lime dust surfaces. One near Thunder
Bay was acceptable in 2002. We went into and right back out a number, of
KOAs  over some time. The rates have always been high, for what they
offered, which was generally run down parks dimensioned and laid out for
small campers of the fifties.
When it gets to the point that they charge as much as a luxurious RV
resort it is time to write them off.
KOA is a marketing outfit not a RV campground chain.