I had a quick look in komoot and along the river Elbe it will be around 215km. So 45 to 65km per Day should be the distance to plan with. Normally, I start with looking where the first stop would be. For you that is around the German-Czech border. Then I have a look for a camping site on Google Maps.

The distance between Munich and Praga is 301 km. The road distance is 381.9 km. Bus from Dresden central station to Prague Ave. Duration 1h 50m Frequency Hourly
Prague to Dresden Train Information. Train travel from Prague to Dresden typically takes 2 hours 26 minutes, covering a distance of about 116 miles (187 km). Tickets for the trip start from $33 if booked in advance and there are 6 trains per day between Prague and Dresden. Shortest travel time: 2 hrs 26 min. Longest travel time:
The map ends at Prague. 343.6 Kilometers (Trip Total) Route 1 (193.2 km) on Map Berlin » Dresden. Route 2 (150.4 km) on Map Dresden » Prague. View Road Map. Route spans across 343.6 kilometers of land. The road map above shows you the route to take to your destination. You can toggle between map views using the buttons above.

The distance between Copenhagen and Dresden is 520 km. The road distance is 966.8 km. Bus from Prague to Dresden central station Ave. Duration 1h 50m Frequency

The distance between Dresden and Kyiv is 1180 km. The road distance is 1383.1 km. Bus from Dresden central station to Prague Ave. Duration 1h 50m Frequency Hourly
RuaXI0. 84 913 378 669 519 490 185 338

distance from dresden to prague