I set my trail cam at 2 pics every 5 minutes. I tried the 2 pics every 15 but took to long for the pics to get taken. I also put tape on either side of the sensor so the animal had to be more centered in the pic. Mine was set about 15-16' away from bait. First camera got clawed up and it was 6 1/2' up a small tree. The second camera I moved up the tree to 7 1/2' and a bear chewed on the corner of it. But the only time I had a bear mess with the camera's where when I ran out of bait.
Here is a very handy and effective device I use to dispense corn with - but it could also be used to dispense any other seed or deer feed.
I had an old feeder that had a failed motor... I made a set of brackets to attach the feeder to the rear of the 4 wheeler - the lower one encircles the feeder and has a forward section with holes drilled in the outer ends of the bracket... these holes align with two 5/16" bolts that drilled into the rack of the 4 wheeler.
The upper bracket is an "L" shaped...