So like circa 2005? It was fantastic for a little while there. I was old enough to hunt about 2 or 3 years there before all that CRP got ripped up. There was tons of it back then. There was a decade between then and now where it was pretty terrible but they have made a little bit of a comeback. I'll go 2 or 3 times a year and usually we get a few.
I have a cousin that married well. His wife's dad is a farmer nearing retirement and he put several farms into CRP. He will take me and his friends on that a couple times a year and usually it's pretty good. It's a far cry from what you remember but at least it's worth going again. There was a lot of years there where no one even gave a thought to try hunting any.
Edit: Any idea whose ground you hunted?