Sutherland's Tale: Check all bunkers once again?

I am currently looking for the prepper caches for Sutherland's Tale. So far I've found the documents Sutherland wanted from me twice and I've been to all the bunkers except the one in Bleak Inlet.

So can I assume that the documents I need are in the bunker in Bleak Inlet or do I have to check all the bunkers again?