To the first part of your question #4, here's a quote from Al Lutz' column "Timelines and Faultlines"...
...Anaheim has never conducted a park-wide earthquake drill for its Cast Members, and the few minutes of earthquake training Cast Member’s receive when they hire in is so basic and so vague it comes across as rather meaningless.
...the response for a moderate or severe earthquake is for all Cast Members to abandon their work locations and go to a designated “Cast Assembly Area”, while the park visitors are mysteriously directed by seemingly no one to move to separate yet unlabeled “Safe Havens,” which are open areas away from buildings.
If the earthquake response is carried out accurately, the employees and customers would be segregated into separate assembly areas that are only identified on a handful of dusty maps posted backstage.
Not a single word is mentioned in any of the Cast Member training about how to respond to panicky or injured visitors, or what to tell them, or where to direct them.
The salaried park management have also had just a few minutes of vague and useless training in earthquake response techniques, the same as the average ride operator or shop clerk got, so don’t look to the guy wearing the Dockers and the earpiece for useful direction or assistance either.
...There are vague plans to evacuate the parks along designated corridors in the strong earthquake scenarios, dumping up to 100,000 people at one time out into the Esplanade and/or surface streets around the parks.
More earthquake-at-DLR discussion in these threads: