I haven't done it before since I always run out of time, but I plan to try to this year. My side business is actually creating printables like this for parties. Last year I made custom mini favor bags for my son's school trunk r treat.
I enjoy their faces and reactions when they see the full size bars.
I feel the full size wrapper, may loose some of the impact at the door, it looks generic, try a half wrapper, that still shows its a HERSHEY.