This is a pretty late post, but I went to Yosemite a couple weeks ago, and got to see the huge waterfalls. I've never been during the Spring, and so the falls were actually going this time. The first half day, I hiked to the top of Vernal, and half way up to Nevada (just to see it). Then the second day did the Yosemite Falls and Yosemite Point hike. And finally the last half day, I hiked down below Half Dome to Mirror lake.
I encourage anyone to visit the stunning wilderness of Yosemite, it is absolutely amazing this time of year.