Parking, sleeping overnight and camping are not the same thing
They are three distinct legal facts, and confusing them is what generates most fines in Europe.
parking
Leaving the vehicle stationary. In almost all of Europe it is legal wherever any other car could park, and what happens inside is irrelevant.
sleeping overnight
Sleeping inside. In most countries it is NOT defined as an offence, and is therefore permitted. In six it is, and is prohibited in itself: Portugal, Andorra, Croatia, Tyrol, Vienna and almost all of the Netherlands. There the vehicle may be perfectly legally parked and the fine comes for sleeping.
camping
Setting up. Prohibited in practically all of Europe outside a campsite. What changes from one country to another is WHICH GESTURE crosses the line.
levelling chocks
Wedges under the wheel to level the vehicle. In Spain they are expressly permitted from 1 October 2026; in Italy, Andorra, Germany and Belgium they are the literal case of the offence. The same plastic block.
stabiliser legs
The most universally penalised act in Europe. They break the «only on tyres» condition wherever it exists.
footprint
The vehicle's outline seen from above. Putting anything outside it —awning, table, chair, washing hung out— turns parking into camping.