We have been to Europe 8 times and have driven though the Alps in Austria, France, Italy, Switzerland. In the past we have gone the route of Salzburg, Kitzbuhel, Grossglockner, Linz, Cortina and Venice. We will have July 19 to August 2. We fly in and out of Munich July 16 and August 3. We will be staying near Passau for a couple of days for a wedding then on the road on July 20. What would be the next best route south to Croatia. Planned on going through Salzkammergut. Which route is better through Bad Gastein or Katschberg then Bled , Ljubljana, Trieste, Pula.