It doesn't work out that way :\
When i tried to center a location for all barracks it still didnt work.
So what i did, i had all the barracks in one location.
And i had the trigger so it would disable all doodad state for all the bunkers and a couple of seconds later i moved them all

.
Or you can have them all over the place, and make an individual location for all the bunkers.
And to cloak them for the human players do
Players :
Humans and computers who will be affected
Conditions :
Always
Actions :
Runaiscript(Turn on ai vision for player who owns barracks)
wait(2000);
runaiscript(turn off ai vision for player who owns barracks)
And don't preserve, Make sure you have hypers.