We (4 adults) will be making our first trip to Berlin and Prague in August 2019.
My wife and I visited Bavaria and Salzburg this past August and we had a wonderful time.
Here's what I have planned, love to hear some feedbacks.
Day 1 - Arrival in Berlin (4 nts)
Day 2 - Berlin
Day 3 - Berlin
Day 4 - Berlin
Day 5 - Pick up rental car and drive to see Wittenberg, afterwards drive to Quedlinburg, sleeps in Quedlinburg (1 nt)
Day 6 - Quedlinburg, then drive to Erfurt, sleeps in Erfurt (2 nts)
Day 7 - Erfurt and Wartburg Castle
Day 8 - Drive to see Leipzig, return rental car, sleeps in Leipzig (1 nt)
Day 9 - Take DB Bus from Leipzig Hbf to Prague, sleeps in Prague (4 nts)
Day 10 - Prague
Day 11 - Prague
Day 12 - Prague
Day 13 - Český Krumlov (2 nts)
Day 14 - Český Krumlov
Day 15 - Flight home from Prague airport