BP not Eating

[Bogertophis]

...then natural humidity should go up for me soon when its warm enough to open windows, but the outside noise could "spook" the snake?

Snakes are pretty much deaf (notice, no ears- they have some remnant inner ear bones but mostly feel vibrations rather than true hearing) so no, I wouldn't worry about outside "noise" at all.

However, outside SCENTS are another matter- your snake will probably enjoy the variety though- just as long as no one near you is spraying pesticides, either at a home or if you're near a farm (?) as that would be dangerous health-wise.

As for humid hides, what hugsplox already posted. I've never bought one, I make my own as described. Big enough plastic container for damp moss + snake, cut doorway for snake to enter. Easy!