I donÂ´t understand your problem, there is ONE high-level whisky-exhibition in germany - I dare say in europe - which is THE MEETING of the maltheads and this is the Whisky-Fair Limburg in April.
Besides this, there are several smaller regional exhibitions like CWH Berlin, Whisky-Festvial Munich, Aqua Vitae Essen, Bremen, Kiel, Aschaffenburg, .... with mainly regional retailers and only a few importeurs. They are close by, nice, familiar, ....
And there is the interwhisky Frankfurt, Hamburg and Munich (?), which is a highly commercial event, lacking any kind of local charme and taking place in luxury hotels. (Sorry, but I get angry if I just think of the internal paying system with those tokens ....)
For me Limburg is a MUST and my home event the munich whisky-festival is a must too, because weÂ´ll be running free guided tours for newbies and interested guests again. Everything else may be occasionally be visited by me or not, in the last 3 years, IÂ´ve been to CWH and in 2009 I think IÂ´ll be to Maltstock in Nijmegen/NL.