We just got back from there Sunday after 8 nights. 4 nights we spent at Nolin Lake State about 15 minutes just north of the Mammoth Caves Visitor Center. Very nice KY. state park with huge / level / electric / water sites
.... ( water faucet at each site) some sunny some semi-shady and a few of their 35 sites are full shade. The campground is surround on 3 sides by water...And the lake was like bath water....The campground was flooded 2 years ago that came to 2 feet of the top of the showerhouse. (28 feet above normal lake pool level) With that the "whole" campground was rebuilt..
So everything is new..
The other 4 we spent at the Mammoth Cave NP. campground. Heavily shaded sites in general. Only one of the 3 loops can be reserved. The two loops that are "first come/ first serve" have many pull-thru and back in sites. All the campground roads and pads are paved. I did see a few 40' rigs camped there. Most rvers there only camp 2 maybe 3 nights because there is no electric service. It's a 5-10 minute walk to the visitor center.
We'll return in the future and will do the same thing, maybe 7 at Nolin Lake SP. and a few in the park.
Because of the Sequester about 40% of the cave tours were not running. We did the Mammoth Cave Discovery tour, Historic tour, New Entrance tour, Star Chamber Lantern tour and I did the "Wild Cave" tour. If you only had time for two tours I would do the Historic and New Entrance tours. They cover both sides of the parts of the cave open to the public. The lower and middle sections of the cave are the ones closed because of the sequester.
At present there are 400 miles of cave passages on 6 levels. Tours range from 1/2 mile to the 6 mile Wild cave tour....( sorry must be a size 42 suit or smaller for this crawling, squeezing, climbing, un-lite tour
Most days you can by your tour tickets for a tour that day, except the Wild Cave tour which only is only offered once a week (Wed 9am) and sells out a few weeks of days a ahead of time and the Star Chamber Lantern tour once a day at 6pm which tends to sell out early that day or the day before. We pre-bought our tickets a month early.