I strapped an asset tracker to my ski under the battery straps. I picked one up from GoTrack.com. It reports every 5 minutes when the device/ski is moving and every 12 hours when its not moving. $200 for a years worth of unlimited data. I just pull it off when I ride so I dont submerge it with water or risk it coming off and bouncing around inside but the devices are water tight. The guys there said they use it on their side by sides and hauling trailers but also have customers using them for lawn and landscape trailers and equipment etc which are outside all of the time in the elements. I liked this device too because I can toss it in my utility trailer when I'm on vacation or gone for a while (it sits outside). I looked into the airtags too but like mentioned before eventually it tells the person a tag is nearby.
Last selling point on these GoTrack asset trackers for me was I can set it up to have alerts emailed and sent as a text for the First movement of each day. So the first time this thing moves each day, I am notified by text and email! To me that was worth the $200 each year. About $.55 cents to know where my ski is at all times. Worth checking out for those interested in protecting against theft.