I know I will probably rattle a few cages with this post, but I'm just curious if anyone (experienced) has ever figured out a BP set-up that maintains nearly perfect temps and humidity without using a thermostat?

I have my favorite BP (Lucy) in such an enclosure. I keep my baby in there because I know that in the event of an unexpected emergency the temperatures and humidity will not change enough to harm her.

Don't get me wrong. I am a firm believer in thermostats for all my other snakes, and I think everyone should use them.