Germany, Punderich (Mosel) - Campingplatz Marienburg
It's a site for touring caravans really but I was made very welcome by both the site owner and other people (all German) staying there. Toilets, showers, washing up and laundry facilities are basic but in good order.
It's right on the river bank and it's really just a field in front of the bar but the guy who runs the site is very friendly and speaks good English and also apparently Spanish and Russian.
The site owner also runs the bar and keeps a good pint of the local brew
Moselallee, 56862 Pünderich, Germany - Google Maps