I spent 5 days in the valley at the very end of April. I had lots of varied weather, but not one spectacular sunrise or sunset. I guess you can't win every time! LOL I didn't do much hiking as I was sick the whole trip, but I did manage to go to Vernal Falls, but for the life of me I don't know why I didn't go to the base of the falls when I went halfway up the Mist Trail. I think it's because someone said the view wasn't good up a bit further and not thinking clearly said OK. Even though I know the shots at the base are awesome. Anyways, here's some shots. You can see more (and full size images) on my Flickr account at: http://www.flickr.com/photos/davetoussaint/
Pre-Sunrise Cloud Reflections & Half Dome
Fog shrouded El Capitan
The Cascades
A Black Bear along the Merced River
Long exposure of Upper Yosemite Falls.
Classic Vernal Falls
Fern Spring
Valley floor panorama