Bruce, having so recently seen it, I can tell you that Harper does not mention that to Truman in the film.
Lee, the great majority (if not all?) of the interior scenes of "The Shining" actually took place in a studio in England, according to the special features, and to IMDB:
Filming locations for The Shining (1980)
Colorado, USA
Elstree Studios, Borehamwood, Hertfordshire, England, UK
Glacier National Park, Montana, USA
Going-to-the-Sun Road, Glacier National Park, Montana, USA (opening scenes: aerial shots)
Saint Mary Lake, Glacier National Park, Montana, USA (opening scenes: aerial shots)
Timberline Lodge, Mount Hood, Oregon, USA (Overlook Hotel exterior)
Yosemite National Park, California, USA