I've sprained my left ankle at least a few hundred times.  Now it's pretty loose and I can almost always walk out a twist.  But spraining my right ankle is one of the two things I"m afraid of in the boonies (the other is appendicitis).  So I look for traction, ankle support, and lastly drainage.

I've used Cabela's Gore-Tex lined snake boots but one of them leaks.  I tried OTB Abyss boots and found they have about zero ankle support.  Now I have NRS Velocity Water Shoe and I love 'em.  They have the best ankle support I've ever found - as good as using plastic clamshell inserts that go halfway up my calf.  They don't drain all that well but I don't much care.  I could put additional drains (eyelets) in them if that was a problem.

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It looks like NRS might be discontinuing them, so get 'em while they're hot.

Dave