Can I spend the night inside vehicles anywhere?

You can do so as a general rule, also in urban areas, providing your vehicle is parked properly and unless a new ordinance says the contrary.

On this matter common sense and respect for others applies.
In areas of heavy tourism there are usually especific areas to park and spend the night with this kind of vehicles. We recomend contacting the local tourist office to help you planning your trip.
You’ll find magic places away from crowds that will give you more peace of mind and even security.