The only thing I know for certain is where the marriage of Oliver and Louise was.
Tulsa county marriage Gibson, Oliver Norton, Louise May 17 1924 Bk 33 Pg 162
I haven't found anyone that resembles them in 1930 in any state so far. They may have been missed or were moving at the time or their page was put in the wrong county, it's happened before or not indexed correctly.
Does your father's DC have any information about his parents? Did he leave Oklahoma while they were living or did they move also? Did he and his sister marry while in Oklahoma?