I got a fairly bad cut on my leg, not quite bad enough for stitches but will probably leave a scar. I have a camping trip planned this weekend at a lake where we will go swimming and kayaking. I expect the cut to be partially healed by then, but not to the point where I feel safe leaving it exposed. (I'm also a little nervous given a couple recent news reports about "flesh-eating bacteria", even though I know it's rare, and the incidents didn't happen near where we'll be!).
At home I have been wearing a fabric bandage, which allows air flow but only keeps it safe from "dry" contaminants. I did read How should you treat an open wound in the backcountry?, but it's about immediate first aid treatment for when the wound happens in the wild, and doesn't discuss what to do about water.
What precautions should I take to protect the wound before, during, and after going into lake water? What first-aid items should I pack?
Of course, simply not swimming and kayaking is an option for this situation (although it would be a bummer), but this could also be a concern if you got a cut on a canoeing trip or a hike with water crossings.