My family group of 5 will spend one night in or near Mainz in early August on our way through Germany to Poznan (Poland). We definitely want to visit Mainz for a few hours, and I have put an option on the Hyatt so we can be central, but I would really prefer a hotel or Gasthaus in the countryside, a little less international... Perhaps with view of the Rhine, sitting outside, close enough that we can check out, drive into Mainz, park the cars in the old town and see what we can see before heading out to the Harz for the following night. I have also an option in Rüdesheim but I'm afraid it will be quite touristy in early August. Any suggestions? Many thanks in advance!