Crowds at DLR at night in late April?

[tlynch99]

I will be in town for work the week of April 20th and hope to make a short trip to Disneyland. I will likely not get in to the park until around 5PM or so. With closing at 10PM most of the week, will the park be too crowded to get to several attractions before the park closes? What should the crowds look like at night that week since spring break should be over. Thanks.