Beitou Hot Springs question

Does anyone know the rules with Hot Spring resorts at the moment?

I fancy going during the long weekend for a day. I know you used to be able to turn up and get a private hot spring room for a couple of hours (I don’t do public hot springs–somehow I can’t relax sharing a pool with others).

Is that still the case? Could I just turn up when I feel like it, have a couple of hours relaxing without booking. Or do I need to book in advance now because of covid? I prefer not booking, because I don’t know at which time of the day there I’d fancy going for a soak.