We have a block of rooms reserved at the Bartlesville Hilton Garden Inn for $97/night. The following link is an event page that allows us to reserve a room online.
Sooner 71 Room Reservation Link
If you are a Hilton Honors member, click the Sign-In link in the upper right corner of the window first. That will take you to the sign in page (to enter your member information and password). Then you can reserve the room without entering all your contact information and payment method. Plus you will get the miles added to your account.
If you prefer to call in your reservation, the group code is C-1971 (I don’t think the C- part matters). The phone number for the hotel is 918.336.0808.