I don't know the time line for Nebraska but they might not even be up.. ask Tj this year's time line seems a little off to me little later than normal..
Animals won't get them all.. 15 acres might simply not have any between my 3-4 places were talking close to 3000 total acres not all wooded acres but prolly close to half is and I hunt hard sometimes 6+ hours a day up and down sinkholes and hills the hole time..If I average 2-3 hr I'm usually pretty happy..