This is a Haley Davidson bash with plenty of live bands etc.
You don't need a Harley to go there.
I have not gone to this bash yet, but apparently the entertainment is free, live bands etc.
I would expect the camping fees and booz are expensive, so it may be a good idea to take a couple of bottles of wine etc.
http://www.harley-davidson.com/en_GB/Co ... cale=en_GB
I'm not sure if I can make it this year, but if I do I'll take a leisurely ride back to Hamm.