During the summer months it gets very hot in Oklahoma. Temps can reach 110 degrees under the sun. FC411 recommends shorts and a light t-shirt. Also a bathing suit that meets parks policy is nice as well. Hand held fans and sunscreen is helpful especially under the sun.
Parks Policy on Bottled Water?
The parks policy states no outside food or drinks are allowed inside the park. Not once have I seen anyone stopped for bringing their own bottled water. Call the park for their suggestion on this.