At Jewel Cave we took a ranger led tour of the cave. It was called the Lantern Tour http://www.nps.gov/jeca/planyourvisit/lanterntour.htm. At the beginning Ranger Mike (our tour guide) told us a little about the cave and Gave us our lanterns. We walked down to the cave entrance and went in. After Ranger mike shut the gate behind us, he explained to us where we were going and how we would get there. First we walked down a passage and came to a larger room. He told us we were going down a row of six ladders with only a lantern for light. After we went down them we went down some more passage ways. Then we reached the turn around point of our tour. Ranger Mike told us that they had only discovered 3% of the cave. He said that there could be up to 4,000 miles of cave and they were discovering 4 miles a year. We headed back and reached the cave entrance in no time. I glad we got to go on the cave tour and I would do it again. Before we left we turned in our Junior Ranger and received our badges.
We stayed at Heartland RV Park while we visited the Black Hills of South Dakota. We used Passport America discount, but they did charge a fee on top of the price for kids (aka kid tax.) It ended up being about $30 a night.