a suggestion to
1. buy from REI
2. try out your shoes on a multiday cold weather trip with freezing/wet ground conditions with stream crossings ... BEFORE going to patagonia ...
if it doesnt work its better to fix it up here than down there ...
all the theory on BPL is fine and dandy, but you have to figure out what works for YOU ... and in the process youll likely learn more than you ever will online