" without pictures it never happened"
It happened alright, wish you had taken some pictures..
In my younger days while working for Westinghouse they did and I understand still do use Ghost fleets
for transport of fuel cells etc for special projects , due to plutonium content , it was not unusual
to have up to 8 rigs with armed guards, and yes as you say typical was the powder blue cabs with stainless
trailers all unmarked bristling with antennas,, I would bet that is what you saw..
I have wired up a few of those trailers.
Just yesterday
by coincidence a neighbor buddy came back from Florida from his job, he is a tech for the INL in Idaho
and mentioned about the escorts... His escort was 12 rig just as you described for
fuel cells made at the lab , so cool in design but oh so deadly in the wrong hands.
Quite a few of my neighbors work out at the site.. Military assist with most of these transports.
I doubt its anything more than that... But conspiracy theories are always on someones menu..
I am just glad that such a fleet exists,, can never be to careful. IMO ..
Be well.