So you get
two 'Oxonmoots' in Germany! Actually, the UK TS do a seminar too but it's not over a whole weekend, just one day.
Which reminds me...
Sarehole Tolkien Weekend
The Tolkien weekend, which is free, is on at the Shire Country Park, Birmingham, 19th & 20th May. Apparently its good fun, plenty of events such as weaponry displays etc, and the TS always have a stall there. You might even get to see Bob Blackham who wrote The Roots of Tolkien's Middle Earth - very entertaining and interesting bloke.