The east and west sides of the state are pretty different. The east side (I.F., Pocatello, etc.) is pretty much big farms, ranching, and people that work out at the site. Pretty conservative, lots of Mormons, and the economy isn't too active. And yes, there is a lot of room to shoot. There's a nice 1K range at Rexburg, and plenty of open ground as well.
The west side centers on Boise. The economic base is pretty diverse, but weak (think California lite). The west side is pretty liberal (compared to eastern Id.) but it ain't as bad as it could be. You can shoot around here. There are a couple of 500 yd ranges, and a couple that go 1K within easy driving distance.
North Id. and the Magic Valley (Twin Falls) are different from Boise and I.F., but I never lived in either one of those locations.
I currently live and work near Boise, and drill with an NG unit in I.F. I prefer the east side, but HH6 wants to stay close to her (older) family in Boise.
Oh yeah, the winters here, especially in I.F., ain't the same as Virginia.
Hope this helps.