My sister and I recently stayed in the campground at the Kentucky Horse Park in Lexington, KY (http://www.imh.org/khp/
). We went to see the exhibition, "All the Queen's Horses" (superb!), plus the park in general.
The campground is excellent with good layout, w/e at each site (no full H/Us), a pretty good store, very clean showers and restrooms, nice pool and tennis courts and kids playground. There are two dump stations that can each handle four vehicles at a time.
The setting is very beautiful, rural and quiet. You can take a free shuttle to the KHP itself, or drive there and show your campground receipt for free parking ($2.00 otherwise). You also get a discount on the tickets into the KHP and if you are 62 or older, they will discount another 10%. The campground also discounts for seniors.
The KHP is 1200 acres of rolling, white fenced paddocks containing every horse breed imaginable. The exhibiton part itself is a collection of beautiful Kentucky racing-style buildings and many, many bronze sculptures of famous horses, including Man O' War. The path to his statue shows the racing strides of several horses, with Man O' War's being the longest at 28 feet.
The campground is open to those who are not intending to go to the KHP itself, so even if you aren't interested in horses, it's a great place to stay. But if you are
interested in horses, it probably can't be beat.