From my experiences your big bucks are not going to come into the feed sites, howeverI still use them (timed) and hunt the staging areas and travel routes. The does and young bucks have no problem hitting the feed sites in the day time but most of the pics I get of bigger bucks are at night when they come. I do think that a timed feedr would help your issue b/c I used to have a gravity feeder at my house and were seeeing a lot of deer sign but until I went to a timed feeder I didn't hardly ever see them in the daylight hours. That has been what I have noticed over the years.....