When I lived in Smithfield (just north of Logan) there was a private shooting range at the bottom of Smithfield Dry Canyon, spent lots of evenings there. The field below it was winter range for mule deer, used to count over a hundred on a December evening. It's now a housing development. I'm going to say that Cache County is the victim of its own successes. If I were to move there now, I'd go to Preston (maybe - I haven't been there in a long time - might be a similar story). There is some fine fishing but you have to look for it...
