Bring a wide-brimmed, loose fitting hat. There should be several inches of room between the top of your head and the cap to allow air circulation so sweat can evaporate, thus cooling the head. Tight-fitting caps are a bad idea, because they increase heating. Regular exposure to UV radiation leads to cataracts and other eye disorders. Fishers are at higher risk because water reflects UV rays, providing a double threat.
Polarized sunglasses help reduce glare.
Glare is the kind of thing that causes cataracts and retinal aging. Used with permission.