Cecil:
I don't know the size/depth of the waters in question, but strongly suspect that since the state did the stocking they did it in larger, public bodies of water. The map of their RES successes is strongly affected by the climate-moderation from the great lakes. It runs considerably farther North along Lakes Michigan and Huron, dips South in the middle of the peninsula.
I don't think there is any question that larger, deeper bodies of water would have more moderate temperatures and temperature changes in the Winter. But in marginal situations, you don't know if it will or won't work until you try it. I bet if RES can make it anywhere in Nebraska and South Dakota, they can probably make it in a Kansas pond.
ZHKent - please let us know how your RES do, especially over Winter.