If IASW wasn't undergoing a year long refurb, it would have been open too, as far as I know. For some nutty reason we didn't go on IASW done up for the holidays last year, and for the life of me I can't remember why!
January can be very nice. The only exception is New Years Day and MLK weekend. February is also nice, just avoid the weekend of Lincoln's Birthday. We went that year one year and it was totally insane. Not President's week but rather Lincoln's Birthday. A lof of the schools in So. Cal have a long weekend and believe me, it shows with park attendance!
Yep, I agree, I made the mistake of going on Lincoln's Birthday weekend this year and it was CRAZY crowded. I mean like scary crowded with tons of kids who were out of school on Monday. It was also surprisingly hot (in the upper 80's). The only good thing was there were a LOT of celebrities in the parks, Johnny Depp, Harrison Ford & Calista, and Diane Keaton to name just a few.
We went that weekend in 2006 and I am telling you it was insane! It was really hot that year, which was nice for us (it was snowing at home).
Too funny, I saw Diane Keaton at DCA in June of 2006. But I have never seen Johnny Depp, poor me!