Other things to take in consideration for Disney - Stage Management is not considered strictly management - although it depends on the show. You are more a cue caller. They have show directors that maintain most of the shows. You are swapped out alot. To keep people from going into overtime, and to have up to ten shows a day for some attractions, you need to be replaceable. Which also means, everyone needs to manage the "Disney" way, so there is a lot of compromising of individual style.
Like most commercial ventures, they are EXTREMELY bottom line conscious and very cooperate. You will also find that you will be trapped between various departments a lot, specially when you are doing a well established show. (Like a special event, a temporary show, etc.)
Also, there is the fact you are dealing with a certain level of talent - because they need so much talent, not all of it going to be GREAT, and often they are very, very young.
I have a few friends who launched great careers with the parks.