Big Bore,
Good luck finding that. I lived in Greeley for 4 years when I was going to college. I tried to find some spots for a while, but it was harder to do than balancing my GPA and Blood Alcohol Content.
I would contact the DOW office in Ft. Collins, they will be able to give you some advice on what lands are out there to hunt, problem is you and every other hunter along the northern front range will be out there. Let me know how you end up with your search. You may even want to look out by Ft. Morgan or Sterling. Good Luck.