Well if i were you i would stick with what you are doin cause you are seeing him and if he has no reason to be spooked from the area then he isnt gunna leave and he should eventually give you a shot, the only thing that you can really do with this fellow is have patience im thinkin. But im also thinkin if he is hangin around the food plot he is eating from it but another thing you could do is maybe find out where he is entering the food plot and set up closer to his main travel route. But i also dont have the most experience when i comes to whiteys, so maybe some of the more experienced guys might have a few better pointers for yah.
Me out elk hunting this year.

Just for the record i dont wear the glasses while hunting, i just got really bored