One of the things I really like about my daycare is that they provide webcam service so I can stalk.. I mean check up on my furbutts whenever I feel the need.
They have at least one employee in the room with the dogs at all times and sometimes two. I believe they have 3-4 rooms and they place the dogs by temperament. If I'm feeling concerned, I ask them to keep an eye on my two just in case and I see them (through the webcam) doing so.
This daycare is bit on the pricey side but I feel it's well worth it.