Idaho has the same Prairie rattler as WY. They can bite but as long as you're a bit careful they aren't anything to worry about. I sure wouldn't spend the money for boots. They're timid and you will often see one crawling away. If it coils, just back up a step. They can only strike 1/2 their length and most aren't all that long, at least not compared to some of the southern snakes. Most are under 4' so there's a total striking distance of under 2'. I've been kicking around the Idaho desert for 70 years and have only seen a handful. Only a few of those coiled and rattled. Most just crawled away.
Just keep your eyes open and have a good hunt.
