According to this article three of the top thirty counties in the country for homes that have guns are in Idaho. Nez Perce County (Lewiston is the county seat) is number three with 59.0% of the households having guns. They were edged out by Fairbanks borough, AK and Tooele County, UT both with 59.1% (I want a recount!). I don’t consider it home but I do own a little land in that county and drive through parts of the county whenever I go to the Boomershoot site.
Nez Perce County is home to CCI and Speer which are some of the area’s largest employers so those workers probably contributed a far amount to the gun ownership in the area. Another thing that probably influences the ownership in the area is the good hunting. Hunting is a very popular activity there.