You can also just stand along the walkway, behind the theatre, in front of the American Pavillion, and watch from there. Yes, you have to stand. And yes, it can get very crowded if it's a very popular narrator. But, it's better than nothing.
Even those with the dining pkg have to line up nowadays. We seldom get into the line earlier than 35-40 mins prior to the show, and end up joining the line way back by Japan!!
I have seen the standby line wind around and around if it's a popular narrator. There was one day I saw a woman, sitting in one of those seats that is a cane and you pop it open to make it a seat, at the head of the standby line....at 2:30, for that first show!!! She had a book and looked like she was there for the long haul. I have to eat anyway....so I tend to get at least one pkg each trip. It's probably a bit more than I normally spend for dinner but it's special.
If you choose to do standby, expect to be in line for awhile....especially if you wait until later in your trip, or if the narrator is popular!!