the Orange County news reports that after 50 years grad nights will no longer be held at DL- instead the all-night party will be at DCA:
"Seniors are able to visit both
Disneyland and Disney California Adventure during regular park hours. But the most prominent part of the Grad Nite experience the late-night parties will move across the esplanade."
This is the info: Includes: Disneyland Resort 1-Day park Hopper ticket, admission to Disneyland Park and Disney California Adventure Park on the same day, including re-entry privileges. Arrive with your school anytime during the day, Park Hop between Disneyland Park and Disney california Adventure, and enjoy a Private Party in Disney California Adventure after park closing until 3am.
When

isneyland® Resort: May 9, 10, 11, 15, 16, 17, 18, 22, 23, 24, 29, 30, 31 and June 5, 6, 7, 12, 13, 14, 19, 20, 21, 2013
So you can expect some school groups that first week, but still a far better experience than Spring Break
Oh the memories...
Grad night was fun...we had to wear dresses and blazers or sweaters...ride the bus all the way down, Disneyland all night and the bus ride right back home- 8 hours or so each way...