I’ve been to Channel Islands, all over the Los Padres, big bear and the southern sierras. Where else in southern California do i NEED to camp?
Anza-Borrego Desert SP and Joshua Tree National Park are perfect for winter camping.
I haven’t camped there yet, but Carizzo Plain looks pretty interesting. There’s two grounds and lots of BLM land as well. interesting wildlife and amazing wildflowers in the spring.