Your room was certainly searched (effectively required in all the big strip hotels after the 2017 shooting) but those searches are mostly housekeeping crew phoning in anything particularly "problematic looking" during regular cleaning and a separate set of dedicated staff doing random walk-ins every day or other day (generally without touching anything) where they step in look around for 30 seconds and go to the next room. It's designed to be exactly the thing you never notice while you are there unless you don't leave your room.

Interesting! Except I put a game camera in my room facing the door. I couldn't even get fresh towels without calling 4 times. Maybe I was just lucky.

Same here.

Been using a little fake phone charger that's actually a hidden camera in Hotels for years now, and didn't see anyone come in.

Sure, its possible the maids are secretly 31337 h4xx0rs and noticed the device, pulled it, plugged it into their computers, deleted the video, and replaced it, but I somehow doubt it.

Per the image in the linked post daily room searches are mandatory for people staying on property who booked as part of the DEFCON room block