Jim,
I don't recall ever being inside the mansion.
When I finished elementary school in Ponca, we left the town and I have since never returned, except for family funerals.
To a youngster, it was a very good town. I can imagine it might be pretty boring to and adult, unless you were part of one of the "inner circles" there.
My grand parents later house, in Ponca, was constructed utilizing some timbers salvaged from one of the old 101 Ranch buildings.
My mother was born in 1909 & one of her brothers was born in 1907, the year Oklahoma became a State.
Regards, Don