The folks at Bardstown were kind enough to send me samples of their newly acquired Green River Bourbon both the rye recipe and the wheated.

Green River Bourbon
Age: NAS
Proof: 90
Neat
Notes: The youth comes through, grain and spice, slightly herbal. Vanilla frosting sweetness.
Green River Wheated Bourbon
Age: NAS
Proof: 90
Neat
Notes: Soft, sweet, hints of nuts reminds me a good bit of Larceny. Honey wheat bread, spice on the finish. Vanilla and oak on the finish.
TL;DR: Looking forward to a higher proof and/or age stated release!