Left Weimar, having looked at the kilometres and decided this was a driving day. Did not plan to spend much of it in traffic jams. Initially found the route we planned to take had a "No through road" sign and we could see the road torn up ahead. This time we just turned around and back tracked, rather than ignoring the sign. 
 
We then travelled through the Harz Mountains , which are more like rolling forested hills(maximum height 1142 metres) but very scenic and well worth the visit .
Then on and through Hanover. After Hanover, we crawled for over an hour in solid traffic on the motorway, for no apparent reason. Then travelling past Hamburg to get to the 3 km tunnel under the Elbe river, we crawled for 90 minutes, although we blamed Friday afternoon for that, as it seemed to be banked up in every direction. All we saw of the city was cranes, 1000s of containers and distant docks of the port where The Boomer had been 3 months ago, en route to UK.

We had to find a camp for the night. First on the list turned out to be the depot where you collected hire motor homes, not a camp at all!

Second "camp" was a scout camp!

So we camped in the car park of the motorway service station( a designated free camping stop in our book.) At least 6 other Motorhomes with us, and we slept well with the continuous roar (not hum) of the motorway nearby.

John went to investigate the servo next day and discovered they put on a Smorgasbord brekkie better than a 5 star hotel, for coaches, truckies and anyone else. Pity we had already eaten!