Coljac,
We stayed there last week, one day we had a violent thunder storm, resulting in several pitches getting flooded, our was one of them, It took three hours for,the water to drain enough for us to get out, in the end water was sucked away by a smelly industrial lorry.Make sure you ask the wardens which pitches are prone to flooding in the case of heavy rain. They are displayed on the counter,Suggested they told people when they arrived as everybody we spoke to was unaware which pitches could flood.