I'm not entirely convinced that fully disconnecting is necessary, although it is nice. Instead, I take an old phone without any work stuff on it, and go moto camping. Occasionally, messages will come in from friends and family, and I can respond to them.
But the most important thing, imo, is not attaching yourself to outside responsibilities for a few days.
But the most important thing, imo, is not attaching yourself to outside responsibilities for a few days.