This park did a study where they found that rattlesnakes only need to be moved a mere 100 to 200 meters and they would then avoid their capture site.
http://www.lvrj.com/news/rattlesnakes-attract-attention-at-national-park-119135234.html
http://www.lvrj.com/news/rattlesnakes-attract-attention-at-national-park-119135234.html