Jca, I've been lucky enough to take a couple of turkeys in the fall with a bow, and both shots were right through the wing. both turkeys went 0 yards.
I've heard aim for the wing butt, but I beleive with a good broahead anywhere through the wing will stop the turkey.
in my opinion, the best shot is right through the back.
I took both my turkeys from a treestand, but I just bought a ground blind that I'm gonna use next spring. it's almost a necessity when huntin from the ground.

daytona 500 winner- Ward Burton
go Cat-22