Richland Reservoir has a vaulted toilet, lots of wildlife, and quiet. It was windy for my stay so be prepared for that. So far no rattlesnakes or ticks or chiggers but there was a bald eagle hunting the reservoir. For spring, blinds are reservable at the ranger station to view the prairie chickens and grouse doing their mating rituals. I used a cell booster with a 20ft antenna to get cell service. Your mileage may vary. You can find water and a dump station at Fischers Lilly Park in Pierre to the north. If this site is to crowded Google Sheriff's Dam which is just down the road. Google gets you pretty close. That is another lovely site, but has no vaulted toilet.