We are approx. 1200 km away from the Ruhr area. We recommend the route via the A2 to Berlin, A10/A12 to the Frankfurt/Oder border. From there, the highway (A2) is subject to tolls (approx. 10 €) until Poznan. The route continues via Torun and Olsztyn. The route is very easy to drive on, with little traffic.
There are flights with WIZZ Air to Gdansk and with Ryan-Air from Weeze to Olsztyn Mazuri