Use their App to preview the site. Users descriptions are usually pretty accurate if you can read French or use Google translate. Photographs submitted by users also show whether they are car parks, (and some are), or leafy woodland settings.I only seem to find the crapy ones so I try to avoid them.
I object to paying €10 for a crapy car park with EHU that I don't want.
I might like a decent one if I ever find one but would rather have the option of paying less without EHU.
Distances to the nearest village etc are usually given.
We see where we want to go, look for the nearest decent place to stay and check it out on-line. As regards CCP Aires we have arrived, looked and left, because we were disappointed, on only three occasions over the last few years. But it maybe that we are easily pleased. We don’t like big commercial sites so tend to use Aires, CCP Aires and Municipal sites whenever possible.
However, it would be a dull world if we were all the same.