I braved the crowds and went into DC on the Saturday after the mid-week announcement of peak bloom, the Cherry Blossom parade and a Japanese Festival. It was also perfect weather. The crowds were as anticipated--huge, but I got there at 6:15am and it wasn't too bad early on.
I started with the Cherry Blossoms which were a couple of days past peak, but still looking pretty good in places. Here's one from the morning.