Update is in the 3rd post.
Just spoke with a CM at the information booth in DCA and got the following information:
* In the nominal case, DCA will not open until the security close-out of Disneyland is complete.
* Due to the expected straglers tonight, this is estimated to happen at around 3AM, but it highly flexible. The CM wouldn't say what the typical security close-out time was.
* However, if the Fire Marsial deems the crowd in the Esplanade to be a fire escape hazard, queueing in DCA will begin early.
Hopefully this is the right place to post this.