Photo Spot Details
Needless to say, Tidal Basin during the Cherry Blossom Festival gets very VERY crowded. Best time to photograph would be around 7 AM during a weekday, when DC residents are working and tourists are asleep. Tripods are allowed but actual use may be challenging if you go during a peak hour just because of the sheer number of foot traffic.
I wouldn’t recommend expecting to take a great sunset photo. Tidal basin area is not exactly a great location to get beautiful sunsets.