Good to see you're still out there, walnuthead. Nye doesn't talk about the prehistoric sites much, but another book, by E. Buford Morgan, 'Wichita Mountains-Ancient Oasis of the Prairies' mentions the prehistory. Another good book to get if you can find it. If you ever get over to Tom Steed, go over to the parks' community shelter and look along the lake shore just west of it, as there was a village there at one time. When the lake is down, walk straight northwest of the northwest corner of that shelter, and you might spot a grinding basin. If nobody has taken it. I turned I upside down. Look at it but please leave it there. There were two, and the first was a little better and the park wanted it for the park office to display. Didn't tell em about the second one. I thought it was fine to leave it where it had been for hundreds of years. Enjoy exploring SW OK!