This park is nice for maybe a couple of nights, but you are right on the highway, as most KOA's are, so you get a lot of highway noise. Only stayed one night, but the park seemed nice and clean. Sites are normal KOA size and most or all are pull throughs. After 10 hours on the road, it was a nice easy stop. Watch out for pot holes in road to the entrance.
We stopped here on our way home from Yellowstone. Very nice park. We had a lake view and the sites are spacious. The park is well maintained. There is a $4.00 park entrance fee on top of the nightly rate. We stayed 4 nights. There is full hookup available at Lake McConaughy which is just a few miles up the road and on a larger lake, but they were not as shady as the sites on Lake Ogalala nor did they have lake views. Lake McConaughy has a lot of sandy beaches that you can drive right down to the lake. We had no idea Nebraska had that much sand. It was like being on a beach in Florida. No dump at Lake Ogalala, but there is one at Lake McConaughy.
Believe what others have written about this park. Sites are the closest we have ever seen and we have been camping for over 20 years! Even though they say they can accommodate 40 foot trailers, expect to spend some time trying to get your trailer backed in and make sure you leave enough room for your slide outs. No fires or picnic tables. If you cook outside, you must put everything immediately away afterwards. Expect no TV reception. Otherwise being in the center of Yellowstone was a plus, since you will have to drive to anywhere you want to go. Since you basically just use your trailer to sleep and eat in, this park will do. If you don't mind the driving, Colter Bay RV park in the Grand Teton National Park are better sites. All sites are pull through, but the trees are close, so you would have to be careful. We did not camp there, but did drive through it to check it out.
We stopped here on our way to Yellowstone. Nice little park with friendly help. If I would of had more time, I would of liked to stay here more than one night. Town was very quaint, definitely a western town, and I would of liked to explore it, but did not have any extra days planned for it. Park is in heart of town. We had a spot on the river which was a great view out our back window. I would come back to this KOA.