I feel the same TB. At my kennel the pups who were in the same pen (my choice) only got time out in the bigger area together. That was another reason that I felt they were safe. They had toys in their pen and ones that any of the dogs could play with when in the larger area. They only had contact with their cell mates through the wire.
I leave tomorrow for 2 weeks. I will miss mine terribly but they have a pen about 90x45 meters here with trees, shed. Heaps of room rather than the little boarding area.