Oh no, not one of those "Hollywood" trips. Prepare for deep disappointment. Also I'm not sure what you're going to do in Laguna Beach for 3 to 4 days. As pointed out the odds are bad (though not 100% against) of it being beach weather. (Though of course the odds are it will be warmer than Ottawa.) No interest in Disneyland? The upside is you should be able to get great rates. Of course the opposite is true in Palm Springs.
Also as some of you know I'm into astronomy. The earliest is the sun sets in Palm Springs is 4:45pm. In the southern states "astronomical twilight", or what most people think of as night, occurs approximately 70 minutes later. In northern states it's closer to 100 minutes.