Milky Way Planner has pages for 8 dark sky places in Germany: 4 communities, 2 parks and 2 reserves. Their Bortle classes run from 2 to 6. Each page has the Bortle class, the best months for the Milky Way and a free visibility calendar.
Park · Bortle 6
Community · Bortle 6
Community · Bortle 6
Community · Bortle 2
Reserve · Bortle 4
Community · Bortle 4
Reserve · Bortle 4
Park · Bortle 4