Ive found applying sport deodorant to the neck face ears and scalp works. And keeps your from sweating. I think sweat draws them some. This hat I found on ebay certainly helps. Its well vented.
http://www.ebay.com/itm/231036223874...%3AMEBIDX%3AIT
I spray it generously with a repellant. Some repellants work better than others.
Citronella oil works.
