Hi,
We've stayed at Memling for a few days - great location for visiting Brugge - about a 2.5 km walk to the centre.
The pitches are all grass and on the small side - if you've been to the caravan club site at York (Rowntree Park) they are of a similar size.
Toilet block is OK - clean and Northern European styled.
Unlike the coastal sites - which are oriented at young families - this should be quieter - unless you stagger back "worse for wear" from one of the local brewery trips.
Robert
Note: This region of Belgium is very definitely Dutch speaking (Vlaams) so don't use the French place names or you'll get some funny looks from the locals. Ditto french language.