This is a city park on the river. Dump station and fresh water available. Park has a community pool and several group pavilions. Good for a few days stop and rules limit you to a maximum stay of 5 days.
This is a town park with a kids playground near baseball fields. The park is near a hospital and very quiet. De Smet is a small town, so Laura Ingalls Wilder attractions are within a couple miles. I would stay here again.
This is a large gravel parking lot to support concessionaires of the event center. Camping fees can be paid at the business office in the Northwest corner of the event center. Fees are high for what you get, but its located on a greenbelt with a Walmart next door.