Travel / Advice please on travelling between Gdansk, Olsztyn, Ketrzyn [4]

Hello;

I'm visiting Poland (from the UK) in a few weeks with a friend.

We will based in Gdansk, but there is a plan to visit Olsztyn and Ketrzyn area (yes, alright - Wolf's Lair).

The current plan is to hire a car in Gdansk and to drive to Olsztyn & Ketzryn. However, the accounts of aggressive drivers etc. that I'm seeing on this forum have rather put me off. This would be my first experience of driving on the right, on a left hand drive car, after all.

Does anyone have a view whether it is feasible to do this part of the journey by bus/coach? Apparently Poland has a very good coach network, but the relevant websites seem to be mainly in Polish.

many thanks,

A