I helped do seat backs in East Stadium last year and the year before, so I know the area pretty well. To get to the East Stadium balcony, you go up a ramp that takes you about halfway up, then a set of stairs. That takes you to the top of the lower sections of East Stadium, then you go up another small set of stairs to get to the balcony level.
The only thing I can think of is there are suites just above the balcony that have some stairs that come down to the balcony level. I think there are elevators to the suites, though they are only for people with a suite. You might be able to call and see if they would grant you special dispensation to use those for that purpose. I'm not saying they will or they won't, I honestly have no idea, but I guess it wouldn't hurt to at least ask. You would still have to walk down some stairs to get to the balcony, and back up later, but it would still be an improvement.