I have no hands on experience treating sick snakes (knock on wood). Up until recently I had never had a snake pass in my care. I've been pretty lucky so far. However I have two vets (one really local, one more of a drive) that I've spoken too and I have confidence in both.
Just like most things, planning ahead is of utmost importance.
I also am sitting here waiting for someone to share some kind of asinine home treatment....
FRIENDLY REMINDER: Please always cross reference information before putting it into affect. And make sure you're learning from reputable sources.