Where is my snake?

[Noh]

Okay so I recently moved my lady into her new enclosure - she had well outgrown her ten gallon so I moved her into a new bioactive vivarium I set up.

She's a california kingsnake, and she was active for the first four days or so. Now I haven't seen her in as many days whatsoever. Heard nothing, seen nothing. There's no new tunnels visible on the surface or the sides of the tank - that doesn't mean they aren't there, but for what it's worth there's none visible.

Warm side of the tank is 78-84 fahrenheit, cool side is 72-76, I use a temp gun and thermostat to keep track. She has water and hides. And lord knows, places to dig. Humidity is about medium, the recommended level for calkings. Microfauna are doing ok.

What am I supposed to do if I never see her? How do I know if she's still alive? I could easily go digging for her in her old aspen substrate but somehow I think digging through the dirt in her new enclosure would be a futile effort, plus a massive effort and overreaction. As I'm sure we're all aware, snakes can curl up into the tiniest of spaces. Finding her that way would be hell.

How am I even supposed to feed her? She's not exactly the type to come calling whenever I put mice, dead or alive, in there.