"Turning the pasture that had been the decontamination site in the 'Close Encounters' movie into a KOA campground was an idea from Ogden’s mother, Ellen."

“[Now], Close Encounters of the Third Kind” is shown on a large outdoor screen ... every single night the campground is open, rain or shine."

https://cowboystatedaily.com/2023/08/19/devils-tower-koa-a-close-encounter-with-americas-first-national-monument/