November in the High Sierra can be a really neat time to go, or horrible, and you can't tell in advance which it will be. Other places along your way I can't comment on, but if I were in your shoes I would keep my options open and keep a close eye on the weather as November approaches. If the serious snows have yet to fall and the short-term forecast is good, a few days in the Sierra would be great – and you will have it almost to yourself.