Partly inspired by this thread, I just whipped up some basic pages for the Oku-Hida Onsen Villages and Takayama:

http://wikitravel.org/en/article/Oku...Onsen_Villages
http://wikitravel.org/en/article/Hida-Takayama

If you find any of my advice useful, you are hereby required to repay it by updating every single lodge, restaurant and bar you visit in Wikitravel