If I am picking up my son from the Mann after the show can I go into the parking lot?

You can pull into the uber/lyft pickup lot and wait for them there.

There is a section of the driveway below the Pavilion that allows for Uber and Lyft drivers to wait for their fares. I assume parents could park there as well and tell their kids they are there.

I work for sp plus so look for someone in a yellow vest and they will help you