No night drop is needed for ball pythons. Keep her temps as normal, there's less risk of them contracting an RI.
This is my weekly schedule for breeders:
Weekend: offer food (can be either Saturday or Sunday depending on my plans)
Tuesday night: male goes in with female
Thursday night: male comes out unless they're locked; in that case I just wait until they're done
Oh and no one warned me before I started breeding, but expect the female's enclosure to be filthy when it comes time to move the male back to his home.