I like 17" high Gore-Tex snake boots, or some other waterproof variety, compared to snake gaiters. Cabelas has them on sale occasionally --- I own two pairs. I also own a pair of snake chaps. You'll probably need both... especially if you survey snake infested places --- like on some of the islands on the Cape Fear River, in North Carolina --- like I've had.
Copperheads...will sometimes snake coil in a circle, with it's head in the center of the coil --- poised too strike straight up. The strike could go inside of the snake chap legging --- that's why I would go with the snake chaps and gaiters/snake boots.
Water moccasins will sometimes try to avoid being stepped-on by a human. That's why you should learn to hear for a rustle in the leaves or weeds, as the water moccasin try's to avoid you.
That rifle hanging on the wall of the working class flat or labourer's cottage is the symbol of democracy. It is our job to see that it stays there."
--- George Orwell