Huntin' fool, That is a beauty!! In 4th season 371 in 2009, no one in the camps we talked to had any luck either. Which was salve to my wounds I thought is was because we are new, young and dumb! Congrats on a Great Bull!
Try to put your tree stand in a tree with plenty of background cover, keep the prevailing winds for that time of the year to your face, and take care of those pesky squeaks and creaks your stand may have developed while sitting in the shed. A good treestand lube can be made by heating petroleum jelly until it reaches a liquid form. Some hunters have reported success by including a cover scent in this mixture before applying it to their stands.