Kathy -
I've done it about 15 times, and many more times up to Trail Camp as a somewhat rigorous day hike. When I lived in Inyokern, I tried to do it twice a year - spring and fall.
As to why - well, I hike alot, and so it comes into the 'rotation' on a regular basis. It's a very pretty hike - spectacular in some places. And doing it regularly gives me feedback on my general fitness level. It's also relatively close by, so getting to the VC for a pass is about an hour's drive.
