Bonny Lake Res. was stocked with Freshwater Drum from Kansas in 1951, and they still list them as one of the species in there.
As The_Mad_Catter mentioned, the 17 lb. 3 oz. state record (197
was caught at Lonetree Res. but I have never seen one come out of there and I would question whether it still has any.
If you want to catch a lot of drum, you have to go east and get closer to the Missouri and Mississippi river systems. I've caught tons of them out of the Missouri.