By the way, when you go, I would recommend trying for a top-down trip if you have the time and it works out. I think you have to get the permits early the morning before, and have to arrange with the shuttle company, so it is a bit more complicated.
I have info on this, will try to post it at a later date. We're leaving for Yosemite in the morning, so I'm working on that trip at the moment.
