My brother wears one of these when he trout fishes, and swear by them. Its a BUZZOFF hat, treated with repellant, good for 25 washes:
BUZZ OFF Apparel

I use one of these when I'm catfishing on the Ohio and for Spring gobbler. Never have a problem with bugs, and they clip onto your belt.
Thermocell Repellants

"Coal and people have been our two biggest exports for a long time, which has definitely shaped how we think of ourselves." Scott Hill, WV native and historian.

99 TacoTRD 177K

Montani Semper Liberi