According to our local weatherman, Garth, on KABC7, today's weather will be almost perfect.

I think the weather tomorrow will be almost the same. It's nice and warm in the sun, but can be cool in the shade (and we have an expected low of 39 tonite!) And the winds have gone away.

Thursday's high is predicated at 69 with patchy fog in the a.m.
As far as the crowds go, yes it may be crowded due to spring break (though not all schools here are on break and I think AZ still is.) However, DD8 and I went to DLR on Sunday, March 9th and even though it was crowded, we had a great time.

In fact, we ended up staying 10 hours which is pretty long for us us since we have AP. (We did end up winning a Dream FP!) We got there early (about an hour after opening since that was the start of Daylight Savings and we weren't going to be able to get there by 8 a.m.) We started out at DL, rode alot of rides before 10 a.m. Grabbed a few FP for later (Splash and Buzz) then we crossed over to DCA just after 10 a.m. Rode more rides, grabbed more FP. Had lunch at DTD. Crossed back over to DLR. Rode more rides, used our Dream FP, grabbed more FP. Crossed back over to DCA to ride Grizzly Rapids before dark. Got wet, it felt great! DD8 then played for awhile at Redwood Creek Challenge Trail. Headed home about 7 p.m.
We had a wonderful day. Utilized FP to minimize ride waits. Didn't see any shows or parades.
I would recommend getting there (DL) before park opening. Getting your FP for later. Ride some rides. Cross over to DCA when DL gets crowded. Get FP. Ride rides, cross back over, etc. It worked for us.

(on Sunday, mind you and the DL was crowded!) DL opens at 9 so plan on being at the gates about 8:30, or so.
Have fun!