I also am interested in responses. We are in central IL. Most of our fields are Orchard/Timothy/Brome/Rye/Clover mix. We get a good first cutting and sometimes a decent second cutting (if we get rain) but when the heat turns on the cool season grasses don't grown much. Last year we planted sorghum/sudangrass (sudax), it grows well in the hot dry months. We also have planted a field of red clover, as it does better than the cool season grasses in hot months.
This year we are trying a sudangrass hybrid called Greentreat Dynamo, (it is a brachhytic dwarf). The brachytic dwarf hybrids have shortened internodes, the height of the plant is reduced, but the same number of nodes exists as normal hybrids. We attended a seminar that ofcourse was selling this seed. They explained because of the shortened internodes you will get a leafier plant, you can harvest at a shorter height, you will get more cuttings. They say it has excellent regrowth after cutting or grazing. We followed the sudax last year with winter wheat.
The only negative thing I have heard about planting blue stem or other native grasses is that the seed is expensive and that it can be challenging to establish a good stand. We have some blue stem in our hay fields (native), the cattle like it.
donna