Like Rick said, if the Divide Peak gate is closed, there is no vehicle access to Big Caliente or Little Caliente. You would have to hike in on the trail from Cold Springs Flat on the top of El Camino Cielo. See Joel Dahl;s previous post for a description.
You mentioned " a couple of Ojai ones" I only know of one- Vickers. Is there another hot spring in the Ojai area? Thanks!