Notgrove is one of my favourites CC sites. We can get there in less than a couple of hours, even on a Friday late afternoon as it is cross-country from Northampton. As said, no facilities, but no issue to us, poor dog walk on site, but the walk a couple of hundred metres from the site, once you get past the first 300 metres, is so relaxing.
Last time we were there, I went off with the dog about an hour before darkness. So peaceful and the wildlife - saw deer in the distance, then a stag appeared from a thicket and crossed the clearing around 50 metres in front of me. A couple of minutes later, a fox was crossing a field the other side of the hedge on his night patrols.
Bliss, especially after a hectic week!