Deadly snakes are a problem that I deal with every summer where I live. Are rattlesnakes territorial? If they are then the only way to take care of them is to have them taken far away, where they are unable to return, or to kill them. If they are not territorial, then scaring them off will work, snakes are very shy creatures, and will leave a place where they are being constantly disturbed, they do not like a lot of noise and vibration, so stomping around and banging a few pots and pans loudly, will usually see them off.
Yes, rattlers are more scared of us than we are of them. Given a chance to escape they will generally take that route. They only attack if they feel trapped or threatened. Kind of like this guy who I had to chase down to get his photo: