When placing a trail camera don't just look for a well used trail. What you want to do is look for a freshly used trail off by itself that goes from a north facing ridge, thick forest, brushy knob or some other similar bedding area to a food source. Don't forget water sources. Especially in the summer months the deer need water so look for a good trail going down too a creek surrounded by thick cover and place the camera 100 yards up from the water source.
Scent control is very important when placing your camera. Always spray yourself down with some kind of scent killer system and wear disposable gloves when handling your camera. Then when leaving the trail camera spray down the ground around the camera and put down some Doe-p. then spray down your travel route as you leave. Hopefully this well help you locate some big bucks this year.