I'm not at all concerned about them hiding some space weather. There's too many uncontrollable sources of such reports they couldn't quash. However, various cams and observatories that are in particular positions might well view vehicles or phenomena originating at the bases near Sunspot, and the location of Sunspot makes it ideal for hostile surveillance of those bases.

The descriptions of crews on antennas and towers would also lend credence to such a possiblity.

If there is some testing going on that the USG intends to keep covert, and therefore they shut down cams that might reveal it, but also were tipped off to some spy(s) or surveillance ongoing at Sunspot, that could well explain the evacuation, crews, cam shut downs, and official silence regarding why.

Thanks!