The range I go to has a 600 yard range, but since there are barns just outside the property, they require either two people or a camera system to shoot 600. Is anybody using either the Bulls Eye or Caldwell long range wireless cameras? Just talked to a guy at the range and he had the Bulls Eye and he said the Bulls Eye worked best on a Google pad? I of course am leaning to the Caldwell system because of the price. Any suggestions?