I'm not so worried about the rain as I am about the wind. I see reports of 45 mph gusts on Saturday but letting up significantly on Sunday. I hope it rains another half inch or so. It will hopefully make everything last a little bit longer.
Did you see they are opening the new area of the park next weekend? Look about halfway down on this link...
http://www.parks.ca.gov/pages/638/files/Vallecito%20Days%20Information.pdfWe have been wanting to visit that valley for many years. The view west into that valley from the top of Whale Peak is what got us wanting to go there. Looks like hiking biking or horses is the only way in there for now.