Haven't seen them Jase but don't think I'd be paying that for a stay in the UK for 5 days.
i'm not sure who would. people with that sort of money dont wanna mix with the likes of us 3 and our kids lol.
i went camping to cadwell park for british superbikes 2006 and got flooded out (its where number one son was concieved and did toy with the idea of calling him cadwell). we never camped again but have hired those motor homes a few times and they make life easier....except at Silverstone were we got their after dark and immediatly reversed it into a ditch. Spent the night with the front wheels 2 foot off the ground till the farmer dragged us out the next day.
wife has found somthing called Glamping that looks like comfortable camping.