If ya gotta, carry a revolver with bird shot.
Or use a shovel.
Rattlers in the country arent hurting anything, and I cant imagine a situation where I would NEED to kill one out on the prairie.
Just walk around them, or do what I do, pay no attention at all. Only time I every see a snake is if I am watching for one.
But just in case, wear your Stetson hat. You can confuse them by throwing the hat on them, and stomp them when they peek out.
Sound advice.....