I am English , married to a German woman since a couple of months. As her family is German, we were expected to celebrate our wedding in a traditional German style although many English friends were invited too.
We bought a huge amount of books about the organisation of our wedding - all very much alike, too serious or too conventional or else...until we found Antje Dohrn's "So wird die Hochzeit zur Party!" This book is really fun, the little sketches and games are very imaginative and easy to perform without much preparation. We tried out a variety at our wedding: It really worked out very well and everybody had a really good time!