Route Map: 385 km
Summary: Very good road network to St. Petersburg, dull weather, acceptable border process, indicated parking site was abandoned.
Border o.k. 
For parking site was abandoned I looked for a spot near Peterhof.
Konstantinovskiy Dvorets 
https://dachalindstrema.ru/
Found a quiet Cul de sac with a small security hut including a watchman. I asked him in English and with hand and feet whether I could park for one night. He agreed without hesitation. Later I found out I was in fine company in between the two buildings Konstantinovskiy Dvorets and Dacha Lindstrema.