I wear my schoeps mics in a kangol hat.
I put them above my ears. Part of the side vents are blocked this way. Does this affect sound much?
I can't tell you how much it affects the sound, but that's exactly how I deployed my MK41s; although I tended to push them a little bit more toward the bill. So, they were situated above and a little in front of my ears.
I tended to get pretty good results deploying them this way, and this was in arenas, amphitheaters, big clubs, small clubs, etc.