I have primary custody of my daughters but there dad claims he has his own place to the courts but don't want me to see his place or drop them off there. Do I have the right as a mother to see my daughters sleeping arrangements?

If he won't let you in, you will have to ask the court to have someone from social services examine his place.

You have every right given you in the child visitation agreement,
Normally they are required in most to give you the address. They are not requierd to let you inspect and go in. How old are the children, can they not tell you where they sleep when they get back ?