@BenAllgood, what did you end up doing with these hills? I am in a very similar situation. Matter of fact, I thought for a minute that one of your photos was a photo I took on my new farm!
I am looking to start transitioning some of my hills to NWSG and forbs, and based on everything I have read, you may not even need to plant the NWSG mixtures if you don't mind other forbs being in the stand.