https://www.facebook.com/photo.php?f...5963453&type=3
Sorry can't seem to get the image.
But it shows that it is very rare to be bitten by rattlesnakes, 3/4 of the bites are dry and contain no venom, and that you are ten times more likely to be hit by lightening.
It is like you have to go out of your way or be very unlucky to be bitten.
Most snakes are shy. I've been camping and hiking many times in the small area of Ontario where rattlers exist, and I've never seen or heard one. They are a protected species.