freebeer
see https://www.openstreetmap.org/note/1195436
As a tourist attraction, I feel such names, official or not, are appropriate for an item of greater importance than a generic barn, particularly if the official tourist maps have the same name.
Four of these though.  Five.  Six.
But in order to identify `the barn by Hagerman House' as the home of exhibit X, I am willing to bend the rules for popular tourist areas (like I myself mapped a year ago) so that OSM maps are more suitable for tourist navigation.
My opinion only.