My sister, a SoCal local, was there with two of her kids yesterday (Friday 3/18). She sent me this text:
We met my friend at 9:00 am, when they opened so she could sign us in. Went straight to Fantasyland. Got a good amount of rides done before it got PACKED at 11:30ish. Had to leave at 2:00ish to pick daughter up from school.
A CM friend signed them in for free. She used a Touringplans.com DL Plan and the Touringplans.com Lines function on her phone. She said Lines worked ok, but was off by 20 minutes on some rides. I need to call her to figure out where it was off exactly.
Best advice: Go early! Get as much done as you can before the crowds hit.