Even inside the nest, (just under the bark of the log which collapsed) there are dead queen. Note the eggs scattered about in the background. These were likely brought in as food or executed upon their discovery inside the brood nest.
Lasius alienus larvae (and some other Lasius too) are covered in tiny hairs.
Hopefully accidentally exposing the brood nest to this colony doesn't open the door for more Lasius claviger queens. Lord knows my yard has enough colonies of those as it is.