Camp NCN in Black River Falls claims to be a “sexual freedom” campground, allowing not only nudity, but also public sexual activity on the grounds. The encouragement of public sexual activity is contrary to traditional naturism. Camp N.C.N. (No Clothing Necessary) is creating some controversy in Black River Falls for adult themed activities and loud concerts. Camp NCN: An 18+ Adult Campground. 8) All images within this web site are non-violent. No humans were harmed in the making of any images.