Several times I've been to campsites that people talk about in ridiculously glowing terms - not just word of mouth but reviews in newspapers - both times they've been good but I've always felt like I'm missing something.
Once a campsite has decent toilets and showers what else is there?
In my view the most important thing is the people you are sharing the site with, something the owners have very little control over and will vary from one stay to the next.