I'm not too sure that would work for something like this. Cigars are (usually) kept is a relatively closed environment so the moisture doesn't actually leave. When it evaporates, it gets stored in those beads, then gets released later.
With most BP set ups, unless you completely close off the air flow, you're going to have humidity loss through the gaps, and everytime you change the water you'll be increasing the humidity. Those beads rely on it being a closed environment, which BP tanks normally aren't.
Also, I know msot people on here complain about not being able to keep humidity high enough, and the only way to correct that is by adding more moisture. Otherwise, your beads will just release all the water they have, then sit there not doing anything.
I guess overall they probably would make it a little easier, but you'll probably be recharging them often.
P.S. Not sure if those are snake friendly. Nothing indicates they're not, but I'm sure they didn't study it either.