Animals will leave you alone unless molested or provoked. Do not ever feed wild animals, as they rapidly get used to the handouts and then will vigorously defend their new food source. Around camp, problems with rodents can be avoided by hanging food from rocks or trees. Even the toughest pack can be wrecked by a determined mouse or squirrel who has all night in which to work. Heavily used campsites present the worst problems, but in Nevada there's not much reason to camp in heavily used areas.
Rattle snakes cause concern but can easily be avoided.
They usually warn off intruders by rattling well before you reach striking range. Since rattlesnakes can strike no further than half their body length, avoid placing your hands and feet in areas you cannot see and walk several feet away from rock overhangs and shady ledges. Snakes prefer surfaces at about eighty degrees Fahrenheit, so during hot weather they prefer the shade of bushes or rock overhangs, and in cool weather will be found sunning themselves on open ground. .