Travel Itinerary Recommendation for Germany / Austria

Hello everyone!

I am planning to travel in Europe with my gf, and below is how my travel itinerary looks like. If anyone has been to these places before, can you please share your thoughts & experience. Would be very helpful

21 April: Nürnberg/Munich to Salzburg. Spent the whole day in Salzburg and stay in a hotel.

22 April: Drive to Hallstadt, spend a day and come back and stay in Salzburg.

23 April: Spend whole day in Salzburg and stay in hotel.

24 April: Drive to Innsbruck in the morning and spend a whole day and stay in Innsbruck

25 April: Spend a few morning hours in Innsbruck and then drive to Füssen - Neuschwanstein castle. Lunch in Füssen. Drive to Garmisch Partenkirschen in the evening and stay in hotel

26-27April: Eibsee, Zugspitze, Partnachklamm

27 April evening - Drive back to Munich/Nürnberg

Thanks :)