Keep it a secret:
What was it like?
I thought it was very good. There was a single entrance with security asking to see vehicle passes and race tickets of everyone as they passed in and out whether they were on foot, in vehicle or on bike. This led to a feeling that the site was pretty secure and the situation meant it had only campers there and no persons passing through. The entrance was not opposite the Houx/HA entrance as had been thought beforehand but instead 200m further south along the road. As well as camping on the field there was access to ad-hoc camping in the trees that shield the site from the road.
There was a cosmopolitan bunch of campers of all ages - mainly tents interspersed with the usual mix of interesting vehicles. It was not too raucous but an acceptable level of late night music, bangers and iriots on motos and scooters. I didn't hear of any thieving whilst I was there, but have since read that someone had their scooters nicked.
How were the facilities?
An internal gravel circular access road with three shower and toilet areas - the one we used was regularly cleaned all weekend. We camped opposite it and the longest queue I saw for the shower would have been about ten persons. There was always hot water when I was there. There was power available for those with extension leads.
What was it like getting in and out?
No unreasonable difficulties, but arriving whilst the track is closed at the peak times of Wednesday and Thursday pm/evening will mean you have to join the traffic queue of arrivals to Houx/HA or an approach from the BSJ direction might be better?
MB aside, it will be my first choice campsite for next year.