Glad you're enjoying you're trip to Germany. I've spent some time and Germany myself, it's great isn't it. Although i was drunk many times, I can't stay away from the beer gardens.
I tried wearing a Vader costume in my younger days. I went to con, got many compliments, but sadly it is too much trouble. By the end of the day, I was breathing like Vader, also, I could hardly see and fell down once.