Good advice above, what about rubs are there any? As they get closer to pre-rut you should see rub lines and eventually scrape lines. Rub marks in the tree will give you some info regarding the size/spread of the buck that made them. Bucks tend to use remote travel routes in thick stuff. Right now they are concentrating on food in preparation of the rut when they rarely eat. I too would stay out of the bedding area, set up on food sources, then if no luck set up on scrape lines. Even during the rut I don't find that bucks follow doe travel routes, they scent locate them by cutting their trail or when they leave their calling card on a scrape. If you locate remote travel routes in thick stuff that appear to be hiding from everything you most likely have located a buck route.