As a sitter, I schedule the meet and greet at my home, and I invite the "parents" inside. They can see where their fur babies will be staying, and any other people or animals that will be there. They can see how the interaction goes, and tell right away if their furbaby will be comfortable. I've had a sitter do this to me, not have me come in, that is, and I could hear many other dogs inside when I came to pick my baby up. It made me feel very uncomfortable. It is your right to be able to see where your four legged child will be staying, and feel comfortable in knowing the conditions of the home and surroundings that they will be staying in.