can i leave state with my children before divorce or custody?

For a vacation or short stay? Yes. For permanent relocation, no. 23 Pa. C.S.A. section 5337 defines what must occur before a permanent relocation--you have to notify the other parent of your proposed relocation and give him/her 30 days to respond--he/she can either allow you to go or contest it. If he/she contests it, you will need a court hearing to determine whether or not you may relocate the children.