I am travelling to Dusseldorf in May for a few days. I'm going to the Robbie Williams concert in Dusseldorf and would like to use the opportunity to do some sightseeing for a few days in Dusseldorf and go to a football match. I've been looking on a few websites (lastminute, laterooms, hotels) and the rates are astronomical (over 300 Euros per night). I'm assuming hotels have put their rates up because of the concert. Do you have any suggestions for where to stay? Somewhere near Dusseldorf that we would be able to get back to after the concert?