Hey Tourer,
Haven’t made it over to Germany in our Campervan (not sure it would make the trip) but was there last year for a long weekend, and there was more motorhomes and caravans around than you could shake a gear stick at.
We stayed for a couple of nights in a hotel at the Technik Museum in Speyer and it has a decent size caravan park.. and it’s in the grounds of the museum itself.. looked really nice when we were there..
The museum is seriously mind blowing, I mean seriously.. imagine the kids playing in the play ground underneath an F14 fighter jet, before climbing up to a 747, walking out on it wing, then coming down the slide!!! Our you could take a look at the space museum and the Buran Space Shuttle! You could spend days here and still not be bored.. it’s huge, there’s a good restaurant on site and it’s a ten minute walk into the town, and it looks a lovely town to visit, we didn’t make it in during the day, but felt very safe at night. I would highly recommend it!
speyer.technik-museum.de/en/caravanpark
We went on to another Technik museum in Shinsheim, but they don’t have a caravan park sadly, but they do have a Concorde and a “Conscorski” very worth a visit if your in that area .
sinsheim.technik-museum.de/en/