Nice sites but I've seen rapid price rises when sites have been listed as cool so we tend to avoid them. This website has some lovely listing if money isn't a concern.
On a similar note, we have been to the same campsite in France for the last 3 years - it is basic but has everything we need. The site next door was in the top 10 European campsite list for a uk national newspaper 2 years ago and suddenly became packed out. It has a few more facilities compared to the one that we go to but but it doesn't have the great views, access to the river or space that we have. It also charges 2 or 3 times as much.
Some were. One we particularly like we srltarted using 3 years ago and his prices have increased quite a lot since mainly in July and August. He fills up though so he can charge it. It is a lovely site, we love it. Domaine des Mathevies.