Small food plots and supplements are not very useful for "....bringing the big buck in."

Visual scouting, knowing where he/they stay(s), when they move, knowing where they go, knowing the various routes they use to go to and from, visual signs of a buck's presence, scrapes, rubs, etc. are your best bet to know and choose where you should sit to (hopefully) intercept that buck.

If you know where a buck habitually beds, don't burn the area. He will pull a disappearing act on you faster than you can blink.