I imagine even having them maintain a 2.4ghz wifi connection while running (which I imagine happens even with artemis out of the box) liekly still causes some pain, but I'll think more about that on another day.
Either just being able to sleep the wifi between usages, or chekcins (maybe it already does this)
Or also i was thinking of having a "hub" device or something that connects to the wifi, and then tries to talk to the others over ESPNOW and or bluetooth instead 😛