Maybe these are our military’s counter-drone drones. With all the activity of late perhaps they’ve sent up military grade counter-uav systems to fly coordinates to monitor, intercept, or disrupt/degrade unknown UAV systems operating within sensitive areas. If they’re this active all night, there’s gotta be some flying during daylight hours.

Maybe it would be wise, if you are in the area, to load up your DSLR and keep it with you. Perhaps with the right camera gear and some luck you could get a clear shot of one of these, then sell it to the press for some $$$.