The shelter houses located at Lake Ponca are free and available on a first-come, first-served basis. The shelter houses at Lake Ponca Park are rented in blocks of time, either from 8:00 am - 2:00 pm or from 4:00 pm - 10:00 pm. The cost is $40 per block of time. Reservations may be made up to one year in advance. Call Park Department at (580) 767-0430.