It's one of the more difficult things I've found to do in this state.
I start by looking for a name on the topo or google or geocaching maps. If I find a name, I look it up on the DCNR's website and get a more detailed map of the area.
I always try to look at the closest cache to the hide to see if it has any information about necessary permission needed. (Placed with DCNR permission, approved by CC Parks, etc.)
Finally I say a non-denominal prayer and hit publish!