My favourite overnights plus some others (more to come)
UK Scotland Mennock Pass - Wild site with many spots available. https://goo.gl/maps/y7VLs Have used this a couple of times. No facilities but a stream
UK - Scotland Torlundy North of Fort William. https://goo.gl/maps/Iwn2w Just a lovely carpark but in the shadow of Ben Nevis No Facilities
UK Scotland Kilmahog (wild) https://goo.gl/maps/HUpek Just a quiet car park. Water and toilets nearby (Woollen Shop) Pub very near
France - Camping Le Pont D'Oye. https://goo.gl/maps/SZJ9T Mobile home site with half a dozren pitches Toilets and showers Ok EHU. Little Bar / Cafe open some evenings. Friendly owners and locals. 20 mins from Eurotunnel
Germany - Kinheim https://goo.gl/maps/klWlt Big Stelleplatz on the banks of the Mosel. EHU available but often fully used. Little booth for beer and snacks. Busy but well spaced out
UK - Ribblehead https://goo.gl/maps/t43lN Lovely spot busy at weekends. Carpark / Layby. No facilities