First stop should be Matterhorn as it is NOT fastpassed at you will wait forever if you save this one till later.
Pirates, Roger Rabbits, and Star Tours are NOT connected to the main fastpass system, so take this into consideration. Get your Indy, Haunted Mansion, or Splash fast pass early.
At DCA, I have noted that on my October visit the park was open 1/2 hour before stated opening AND allowing Soaring over CA rides. You will probably want to ride Soarin' more than once, so take this into consideration. I have never needed a fastpass for Grizzly River Run (I think it is an unconnected machine anyway)
Calfornia Screamin' also fills up so fastpass fastpass fastpass.
They will not let you on the rides early, but they will allow you to use them after the time period.
If DL is crazy, just hop over to DCA and decompress - it literlly is steps away (as is DCA)
Go ahead and try for priority seatings. You never know.