This conference does not have an "official" hotel with a room block.
Below is a list of the closest hotels to UC San Diego - be sure to ask for the "UCSD" or "State rate"when booking. All of these are near a city bus route that goes directly to campus, so you can avoid parking on campus if you wish.
Closest to campus:
Sheraton La Jolla
Marriott Residence Inn San Diego La Jolla
Estancia La Jolla Hotel & Spa
Hyatt Regency La Jolla at Aventine
San Diego Marriott La Jolla
Hilton La Jolla Torrey Pines
A little further into La Jolla itself:
La Jolla Shores Hotel
Hotel La Jolla
Lower priced but also a little further away:
Holiday Inn Express & Suites
La Jolla By the Sea Village Lodge
See also: Google Map showing the above hotels and key campus locations