I can highly recommend the oktoberfest in Münich in september/october.. I have been there twice now, and ran in to ALOT of people from the UK!
It is a very busy place.. it is a VERY big festival.. but I asure it is working out well. The Oktoberfest i Mīnich have 175 years of experience handling several million guest in just about 2 weeks.... i am very impressed.
Yes.. I am going there next year too

prost