We are on a tight schedule during our Germany business trip. We will be in Düsseldorf till Friday evening and have to be in Munich by Sunday night. Is there any way we can squeeze a short trip to Black Forest in the weekend? We are a team of four. How much it would cost us?
Have you considered simply going directly to Munich and spending the whole weekend there? It's a fantastic city. Just take the train to Munich, no need to rent a car, and enjoy the city. Be sure to choose (any) hotel in the old town, or you miss the whole point.
If you do for some reason want to see "the Black Forest" you realistically need a car. (It's an "area", rather than one destination.) You can do that easily on Friday night; depending on traffic you will get there late Friday night (leave Düsseldorf as early as possible to enjoy yourselves more). Yes, you can trivially drive to Munich airport Sunday from Schwarzwald area. So it's a simple 2-day car rental, one way rental from Dusseldorf to Munich airport.
I strongly recommend Hotel Diana in the Black Forest. Take all meals there!
Can be done but it's not clear if it's worth it.
- I would get a rental car: it's more cost efficient for 4 people, offers a lot of flexibility and you can drive on the Autobahn
- Drive Friday night from Düsseldorf to a larger town close to the Schwarzwald. Karlsruhe or Baden Baden perhaps. Stay the night at a regular hotel. Check Travelocity for options. It's off season so you should get a room for $120 or less. It's 4 hour ride but will be more with traffic. Once you made it through Cologne you should be fine. By the time you get to Frankfurt it should have cleared out there. Make sure the hotel has 24-hour check in though.
- Start driving leisurely through the Schwarzwald. It's fairly big and has lots of small villages. Stop for food and hiking, more food and beer. Stay in a small village inn or bed & breakfast. It's off season so you shouldn't have any problems to get rooms at very attractive prices ( < 100$) often including a heart-stopping breakfast.
- On Sunday explore some more and then around noon time head for Munich. Should be a straight shot without a lot of traffic on the Autobahn.