Only just the other side of the Dachstein (scene of NEWT 2014) there used to be naked Langlauf based at Obertraun. This page http://dachstein.salzkammergut.at/detail/article/obertraun-fkk-loipe.html says it stopped after 2007.
But a recent report at http://www.taz.de/!65038/ suggests such nude skiing has been happening in the Bayerischzell area above Tegernsee and Schlersee (south of Munich), and is positively encouraged by the local tourist office. .
Sounds like a great idea for skiing NEWTers one winter. Rich, are you in touch with any of those mentioned?