Typically DCA opens at 10:00 (they open the front turnstiles at 9:30). The GCH entrance opens at 9:00 - you will have 1/2 hour before the gates open to the public to get FPs for WOC if you want them, ride Soarin' (which usually opens somewhere between 9 and 9:30), and maybe ride LM before rope drop. I'm not sure whether LM is still open early or if that was just a summer thing.