In reply to Coel Hellier:
Your comments are spot on, except
> But patronising one of the many camping sites is better practice.
Maybe this is true but there are people, like us, who really want to be on our own. We have all we need in the van and don't want company or to pay for facilities we don't need. On top of that we think many campsites charge excessively for a van - call me mean, but I feel 25 quid to park my van overnight is too much. One answer in areas with few good lonely spots is to join the Caravan & Motorhome Club so you can use their certificated sites which have a max of 5 vans and are often little more thana place to park and a place to empty the toilet cassette and charge as little as £5.
Not wishing to adopt the moral high ground, but we will never overnight within sight of anyone's house, and this, coupled with the need to get off the road means that on plenty of occasions we have to compromise and go on a site. Large areas of the UK don't really have any suitable lonely spots, and quite honestly the Peak (singular) is quite limited in this respect.
My advice to the O P (sorry if she doesn't want it) is to always have the OS 1:50,000 map and seek out minor roads crossing moorland and preferably carrying the unfenced symbol. That is always the best bet, and you have the satisfaction of finding your own special place.
Post edited at 18:56