It probably was until people started looking for (and at the cost of) hotels.
One thing probably not appreciated by many is that the night we are there, not only is it Oktoberfest, but Bayern Munich are at home (funny that), and a sizeable percentage of their fans travel long distance to their home games, they are the rags of Germany, therefore hotel space will be less available than normal.
I don't understand why we constantly beat ourselves up over attendances (home or away), we do pretty well in reality, especially as we don't have a particularly well paid supporter base.