Best Campgrounds near New Pekin, IN

Our third Indiana state park. Still impressed, they have all been friendly, well maintained with good, spread out sites and good signage everywhere (even the trails). All the rest rooms are spotlessly clean.
We were there mid-week, so very few of the 480 (!) sites were occupied, except in Buffalo Ridge, the primary RV loop. There are three loops, Buffalo ridge (RV), Raccoon Ridge which is tent sites around the outside, with electric inside the loop. Which would be suitable for RVs. Many of the tent sites are split-level, meaning the fire pit and tent area is down a hill from where you park your car. We have a mini pop-up, and had no problem parking both it and car on the pad, and, these sites have two picnic tables, upper and lower. Check the photos when you reserve!
We drove through Taylor ridge loop, and it's your best choice for getting away from it all. 
The camp store is stocked with the basics, but has more souvenirs than food or camp needs. That's okay, as some of their goods are better quality than many other places.
The park has a classic old CCC lodge (though you enter through the modern addition) so if you don't want to cook, eat at the restaurant (open till 8:PM), great food, generous portions. 
The park also features an Olympic size pool (capacity 2,000). You cannot walk there from the campground unless you are very hardy and very determined. 
You may think of Indiana as flat farmland, but this park is VERY hilly, with many scenic overlooks. It has two man-made lakes. Unsure about boating options on the larger one. 
Another big feature are equestrian trails and a horse campground, see someone else's review for that.
Nearby is the town of Nashville, which is full of art and craft galleries as well as multiple fudge shops, hand-made soaps, etc... Touristy but quaint. Was surprisingly crowded when we passed through on a Friday morning.   
We are planning to go back to take advantage of all we missed in the area. Oh, I should point out that there are many private campgrounds nearby, it's a very popular  area.

My family of 5 has camped at KOAs across the country with our professionally converted 12’x6’ RV trailer (electrical, but no AC/septic). Upon arrival at Louisville South KOA, I checked in and was escorted to our site by staff. Moments later, we were approached by the campground owners who told us we could not stay because our trailer did not come from a factory with AC or septic.

I confirmed with KOA Corporate that no such rule exists, and this KOA’s justification was based on “KY Health Codes” which they could not show me in writing. Despite offering to tent-camp with our trailer in storage, we had to leave and pay $100 more to stay at a private campground over an hour away.

Nowhere on the Louisville South KOA website is this “rule” disclosed. This was a clearly discriminatory and arbitrary. If you travel in a custom trailer or unique camper, avoid this location.