Don't get me wrong, I'm not saying conservatives here are actually conservationists, I just mean that many of them tend to be more interested in the outdoors. I'm just basing that on people I know and encounter, so the sample size isn't huge.
Also, the weird thing about Idaho is that there are at least two, maybe three Idaho's. There is Eastern Idaho, who are largely extremely conservative farmers, then there is the Boise area, which relative to Eastern Idaho is less conservative. Then there is Northern Idaho, which I don't really know how to describe, but they don't fit either category.