We have the Cottonmouth Moccasin's here too ... very aggressive and very poisonous! Snakes of any type scare me and although I've seen moccasin's swimming in the water, luckily I've never had one chase me, that is so scary!
A few years ago we were seeing a few coral snakes too which are quite poisonous and a neighbor had a couple of pygmy rattlers on their property once ... Yikes, I do not like snakes!
We just moved a couple of months ago and our new house has a small pond in the atrium at the front of the house. The atrium is enclosed but I found snake skin in the mulch around the pond ... haven't seen a snake yet. We're going to remove the rubber mulch around the pond at some point and replace it with something else .... when that time comes I think I'll supervise from a distance and let my husband remove it.