The best setup is a combination of conventional vane and ribbon flags in conjunction with one to two Wind Probes. Look upon the range and sea of vanes and ribbons to give the big picture;when satisfied with a general condition, turn your attention to the Wind Probes in your line of sight and trigger your shots from these.
TRY orlandowindflags@frontiernet.net for windmeters they work great
the cost is very good----for flags try hood they have twin tails and show
wind degree with stripes on the inside of the tail. I use three flags and 0ne wind meter the med size --put one flag-wind meater--flag ---flag about 12 foot apart also 12ft in frount of bench to first flag. this is for 50/50