As the other redittor said a line to your tent will alert you if someone is taking your bike.
There are also bike alarms that actually work pretty well.
I got one for a trip to Colorado where the Airbnb host didn't allow bikes inside the house and didn't have any locked storage outside either.
I tested it a few times and it worked every single time.
It's LOUD.
G Keni Bike Tail Light Rechargeable, Anti-Theft Alarm, Warning Electric Horn, Bike Finder/Tracker with Remote, IPX5 Waterproof Electric Mountain Bike Accessories https://www.amazon.com/dp/B01M2BOC7J/ref=cm_sw_r_apan_glt_i_CE2YAJ1C3XS6Z4KY2FHK?_encoding=UTF8&psc=1