I believe that you have to have 20+ in a group and the last figure I heard is $ 10.00 per person per night. If you look at the Map just north of the 2000 Loop you will see an area for the group. It is a large area with its own comfort station, and as I understand there is no Electric or sewage just water spouts. I looked at the site on our last trip while walking the dog and it looked real nice.. You can call FW direct or reservations can put you in touch..