Yes, there is a handicap section for watching the concerts at the base of grandstand sections F through G.  Your friends and family may sit next to you on lawn chairs, the area is paved throughout with slight incline to see the stage.  Wheelchair access should not be a problem, the handicap area will be roped off with yellow caution tape, feel free to enter, security will monitor and help to make space available.  Attendees in wheelchairs or sitting with walkers are welcome to use this area to watch the music entertainment.  Area is shown on our Concert Seating map here