I sent off to Crowland and they sent me a sample of the Bolon 'carpet'. It is very interesting as a material. It is woven in patterns and looked to be more of a mat than a carpet. It wasn't for us but it was fascinating to see. I cannot comment on how it would feel underfoot. Ask around to get a sample.
We are going to get an Outwell carpet which is pretty close to the size we want.
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.