Breaking news (1/19/2015): Arts Circle Drive, leading up to Pick-Staiger Concert Hall, is now fully open. You can drive all the way up to the entrance now to drop people off. Both levels of the parking garage are open, with exits at the east and west ends.
If you park on the upper level, the eastern pedestrian exit is now on the same level as Pick Staiger. There are no steps at all between the parking and the concert hall, and no hill to climb.