The campground at Lewis and Clark Caverns State Park has all the amenities you would need. Power and water hook ups, bathrooms and showers, a nice big playground for the kids. But, it feels more like a big parking lot with little shade or privacy. Great if you are in a camper, but maybe less appealing if you are tent camping. The campground lies at the base of the mountain that the caverns are in--about 3 miles. Once you are up near the caverns there is plenty of parking for RVs or cars. There is also a shady area to kennel your dogs for a fee, as they are not allowed in the caverns. There is also a small deli and a gift shop.

The total hike to and through the caverns is about 2 miles and about 2 hours. The hike to the caverns is about half a mile, and was fine for our 4 year old. However, the two year old, we carried in a pack. Once inside the caverns, there are over 600 stairs and a lot of bending and stooping, so take that into consideration if anyone in your party has mobility issues. There are handrails throughout and no particularly dangerous areas, other than some slippery spots. As long as children are old enough to know to stay near, they should be fine walking and holding hands.