Maybe we could have done better with a campground if we hadn't arrived so late but we wanted to avoid the worst of the rush hour. Found that we had to catch 2 buses to get into Zoological Garden Stn and about 1.20 hrs in time. After we checked out after 2 days there we drove to Olympic Stadium and used the Metro and that is what I'd recommend. Plenty of free parking and I reckon you could get a free camp there as well. Kaiser Wilhelm Church was badly hit during the war so the remaining bits are now a memorial and museum and a new one with beautiful blue stained glass and very different cross view right beside