The number of turkeys in southwest Nabraska are down compared to what they were from like 2008-2012, but they are still way better than they were prior to 2005ish. When I was a kid the dry creekbottom along my grandparents would maybe get a jake or two that would wander through in mid-May, but that was about it. It was that way up through the early 2000's. By the time I graduated from college in 2010 there were about 100 that wintered there, with flocks spread about every mile along that creekbottom in the spring. It was like that all over that part of the state. Now the numbers have dropped back down and there are probably around 45-55 turkeys that winter there. Within a couple years of turkeys showing up, so did bobcats. I'm sure that foxes, coyotes, avian predators, and nest destroying animals all increased in numbers, then they did well, which knocked turkeys back a bit. So yeah, the numbers are down, but it's hard to say how much they are really decreasing there and how much they are just starting to find thier normal balance on that landscape.
I will say this, the turkeys that I like to hunt there, and here in South central Nebraska, and up in the sandhills...they are all in smaller isolated flocks that you could have a really negative impact on if you aren't paying attention. You could potentially shoot all of the older, breeding toms out of a flock and leave the hens with only jakes that can't reproduce yet. You do that on 2 of the 3 flocks on the 2 miles of creeckbottom you're hunting and it's going to have an impact on those next few years. Being able to get three tags and hunt while the birds are still breeding sets you up for that potential problem. Scouting to know how many mature toms are in an area and being aware of the breeding activities of turkeys is important if you are limited to smaller properties or single areas to hunt.