We just went on our first camping trip and loved it! We went to Sandy Balls which was brilliant for the kids but had a few issues we want to fix next time... we weren't able to book pitches and there were 9 tents of families in our group. You aren't allowed campfires... not even in fire pits / BBQ'. And they were very strict on noise.. someone in our group had a guitar and the children were all singing 'the wheels on the bus' to it at about 9 (before curfew!) and it felt lovely and jokingly wholesome...
but they came and told us off.. 
Does such a campsite exist that is almost a wooded clearing for a group that size... but with lovely facilities... within a few hours of Surrey? Or am I dreaming 