We were there a few weeks ago. Amazing show! I actually got tingles when Eden or Megan were singing. I took my 11 y/o dd and she wants to go back again. We left right after her dance class on a Tues. We left at 6pm from Long Beach took the 405 to the 110 to 101 (used the carpool lane on the 110) Traffic became pretty bad about 4 miles before the 101, but we made it to the parking lot with 30 minutes to spare! As far as what to wear...people were in capris or jeans and t-shirts all the way to suits and evening dresses. Anything goes!
My daughter took a couple of photos inside the theater with her camera and had no problems. We had orchestra left row Q and they were wonderful seats. Looked like all the seats would be fine, but i agree binoculars would be desirable in the balcony level.