We pay £200 for our indoor storage. At the moment this is 244 euros. Nice area, though, and some may prefer area over price especially if the owner's campsite is a nice one. I see there are no current tariffs on there, which I think is a mistake as people will take this into the equation when thinking of storing.
If the campsite fees are only 10 euros a night for pitch and hook-up then this might be worthwhile!
Amazing family weekend with old steam engines, classic car displays, market stalls, and full catering and bar. And camping on site - Save £25 by booking in advance.