I will be in Nuremberg for two days. Should I do both full days in Nuremberg or do one in Nuremberg and one in Rothenburg ob der Tauber?
There is enough to do in Nuremberg and fill two days. But Rothenburg is a wonderful and magical place, and worthy of a visit...so flip a coin. If it were me I would tour Nberg on day one, if you see most of the stuff that interests you, then make the day trip on day two. You can make up your mind at the last minute.
If I were to do Rothenburg O.D.T. on Day 2 would I be able to make it back to Nuremberg after the Night Watchman tour?
According to the German Rail site (rail.de) the last train connection to Nberg is at 10:06pm.