Oh, I was worried too - Katie Scarlett not peeing. SO glad to hear she finally did. Going for 8 hours or more w/o peeing I would be very concerned & going to a vet but glad that is not a concern now.
The sleeping a lot more for a day or even 2 I wouldn't be worried about (as long as she otherwise seemed okay) since she came from a very stimulating overnighter at a doggie daycare.
It s/l a wonderful place.