I take my girls to a local kennel a couple of days a month for 'day care'. I know the owner, and it's a very small kennel. She keeps the front door locked at all times and lets my Yorkies stay up front with her unless someone needs to come in. They also get playtime with other small dogs.
Your best bet is to visit the center, talk to the owner/caretaker and get references, then speak to those folks. You should be able to get a pretty good feel for how well they will be care for.
Good luck! My girls get really excited when we turn on the road to the day care
I know they enjoy it there.