We stayed here for quite a few nights in September 2007. It was obviously out of season but there were still a few vans there. Not a particularly big site, the facilities are fine although the bar is better suited to fine weather !
It's well placed for a bit of local touring and a longer stay than a quick stopover is worthwhile.
The V2 rocket launching site is highly recommended and excellent value for money. As it's all underground perfect for a wet day !