I will be traveling to Dusseldorf with my husband and teenaged daughter in June/July and am looking for a hotel with large rooms, including a separate bed for our daughter (not sofa), preferably with kitchenette or breakfast. It would also be nice to have air conditioning, free parking and free WiFi. I've looked into staying in Cologne, Essen and Oberhausen as well, but am not finding much that will suit our needs. If anyone has any good recommendations, I will appreciate any help you can give me. Thank you so much!