Unable to answer "Is drinking water freely available for guests here?" – Stellplatz am Schlossparkplatz Mirow (RV Park) – way/1327094229 via StreetComplete 61.3:

Trinkwasser ist jederzeit verfügbar, kostet aber 1€/60L.

Unable to answer "Does this crossing have markings across the roadway?" – Crossing – node/11935704285 via StreetComplete 61.3:

This is a raised crossing and Speedbump at the same time, without priority for pedestrians. Not sure how to mark it.

Unable to answer "Who is allowed to park here? Parking may be free or paid." – Parking Lot – way/27714124 via StreetComplete 61.3:

Der vordere Teil ist Supermarkt Parkplatz ohne direkte Beschilderung. Der hintere Teil ist öffentlicher Parkplatz.