Maybe just ship them for the flight and set your self up with some simulators in case the planetary alignment enhances symptoms of temporary withdrawal. In general or comparison, the US is usually a bit more expansive than micro-enforcable. To agree with what sleepster said, unless your quads are entangled in a pile of illegal firearms or something like that...
If you were to drive in or out of CA there are state-line border check stations, but an RC rotor not in flight, I've never heard of being any issue, as of yet. I don't really pay a lot of attention to that though, as it seems many cases of multirotor enforcement would probably apply to a lot of other things in a similar situation... but I'm also pretty new and don't always have the extra memory or harddrive space to keep track of, kind of, less interesting aspects.
edit: besides, California is probably the closest US equivalent to Aus. CA, Hawaii, Aus. etc. is also a pretty common circuit for surfers traveling, so... that might be a resource for more info. A few pointers that may be of value or not, if you are going sooner, up till... when ever it might be, is the June Gloom or marine layer near the coast in mornings till mid day or so, on most days. (Just fly inland during this time to avoid that.) Also, winds are usually calm in the morning and kick in high on-shores by mid day/afternoon. Clearly having churned up my memory banks, might as well suggest something as ridiculous and vicarious as picking up a double espresso with a cup of ice, add sugar and soy to the hot espresso, then pour over ice from a Coffee Bean & Tea Leaf... but beware of the long lines... I'm pretty sure that I'm kidding around at this point. Yeah, I guess 'have fun' is kind of obvious by now as well...
