I personally would just stay in Orlando and think it would be a waste of money and time. Only you can decide though.
There is a charm to Disneyland California that I feel even stronger than in the other similar parks (maybe it's Walt's touch) that makes it feel a little more storybook than let's say the Magic Kingdom Park in Orlando or the Disneyland Park outside of Paris. It's a charming place (wonderful vibe). So I guess If you really want to do it sure, but I have a feeling that after you do it you very well might feel it really wasn't worth the time and expense. It's a long way to go from Orlando to California (a good full day of travel each way -- takes up two of your vacation days, and air is not necessarily super cheap). I also like all four of the Orlando Disney parks better than the California Adventure park (the second park besides Disneyland that is there in California -- that second park really didn't do anything for me, but of course since I went all the way there I wanted to visit it too). I also prefer the lodging choices and dining choices in Orlando.
Now me, having done it once (the California parks), I wouldn't do it again because despite Disneyland, CA being my very favorite park it is just so similar to the Magic Kingdom in Walt Disney World (Orlando, FL) and the Disneyland Paris park too. WDW is where I always go, as there is just so much to do in Orlando - not just Disney, Orlando has it all (the most number of different Disney experiences), it's the easiest for me to get to, I have relatives there, the list goes on and on as to why that is where I go for a Disney fix.
You only go thru this life once though. I know my son, for example, who is a HUGE Disney fan always wanted to make a sojourn to the California parks and that's why we did that trip once. Hey and for him when we went to Paris and another European destination, what do you know, we added three more days to our trip so he could experience Disneyland Paris. That though was only about an hour drive from where we were. (Maybe for you it's more like the fact that on our European trip we flew to Belfast as DS is a Huge Titanic fan and spent three days there too. But they we did an open jaw flight to keep from back tracking too much and flew home from Dublin).
Anyway, have a blast on your Disney adventure whatever you decide.