Aren't these the last few weeks to see the valley in bloom?
I went there a few years ago specifically when it should have been in bloom. The best flowers were just outside the east entrance. Even though there were probably a dozen varieties, just about all of them were very small and looked like desert plants. I was expecting something more.
If you want to see wild flowers, drive up Mt. Diablo. Or any of the hills in the area.
Still, Death Valley is a beautiful place and worth visiting if you've never been there. Worth going back to if you have.