I talked with a BLM ranger today & I asked him about the permits but I forgot to ask him about re-numbering the campsites. Anyway he told me the permit is required May-Sept. Fees are 25,50, or 100 per night depending on group size.
If it's during the week you self-pay at the put in. If it's for the weekend you have to call in. You cannot camp at Black rocks on the weekend for two nights (Fri. & Sat.)
you can camp there 2 nights during the week or Th- Fri. Or Sat.- Sun. But not Fri and Sat in the same spot. I guess you could stay 2 nights at other spots like Mee. I'm not sure if specific campsites cost more depending on the size of the site. I don't know if this information is on their Website yet, I guess I could have looked at it before I posted all this.