Hi - not recent info, but I did a trip from Calais to Stalag Luft III (The Great Escape, Crumball Rally) in 2011.
All done in Sigrid the Spitsaab, much to the amusement of the Germans! "Have a good trip"
We camped in Leipzig here https://www.knauscamp.de/leipzig.html. Pleasant site with a restaurant which did a good breakfast. Easy trip into Leipzig by tram. We paid €20 then for 2 tents 3 people .... looks like a M/Home +2 now about €40.
We stayed in Antwerp, visited the Mohne Dam, Leipzig, Stalag Luft III in Sagan, Dresden and Colditz.
Ended up coming via via Munich for Oktoberfest.
Jeremy