Ohhhhh man! Shasta is truly the spot! Everywhere you camp you will find such great mini lakes! I do not live in CA currently but I miss it. CA has so many gems it's crazy. Definitely look into Lassen... also Tioga Pass is great for this time of year if you don't want to head so far North... just don't cross over into Yosemite unless you want to experience bumper to bumper traffic in the mountains ;)