I hope they call and let you know how it's going!
And about your worries of the dogs taking off because they don't know them yet.... the people worry about that too, I'm sure, and will be taking care.
Oh, I hope so! And I hope that they realize the dogs are likely to whine and fuss a bit at first, especially Fritzi. He's really sensitive to change and he'll be depressed for a bit, poor baby.