Deep Creek Hot Spring near Hesperia, on the PCT. Shorter walk in via Bowden Ranch;they might have camping.
If going to DHS^^^, I recommend Sam's Family Spa. $50.00 to camp, but that includes entrance to pool/tubs. Camping is RV park, but it's a good hang. No chlorine in tubs.
miracle springs next door is better, $14 instead of 8 for day pass though. miracle springs has amazing jets in a few tubs; the old school place above only wins out if you want to swim laps.