Will be setting off from SF soon on first road trip in USA. I'm planning on a round trip from SF heading to Yosemite for 2 days, maybe Sequoia and then over to Grand Canyon before returning via LV (not stopping there) and back up Route 1. Any suggestions of route at this time of year? I dont have much idea which roads are likely to be closed and I'd hate to get it wrong as we only have 11 days in all!