<font color=navy>If you're talking about going on Friday, the day after Thanksgiving, then I would say that the crowds would be much worse. That is one of the busiest days for Disneyland.
I went there a couple of years ago on that day, and I literally had to wind my way through the crowd no matter where I went. The lines for all the attractions were extremely long, too. I would not recommend going to DL on that weekend, unless you had no other choice, in which I would recommend going early, using your fastpass, and go back to your hotel for midday and relax, then go back in the evening. It will still be crowded, but you'll be refreshed.