Chris, I believe I can tell you where Crooks hid his rifle and backpack with a relatively high level of confidence. I’m convinced, anyways. Think Occam 's Razor. As for the location, perhaps Greg Nicol had a late Freudian slip when he said he’s heading towards Sheetz. That’s where I believe Crooks went to retrieve it, but he hid it when he left the house.
Here is my analysis, sighting by sighting.