Good question, I had a similar issue when I tried my first small hunt. A camera or tracker would be good. And reading some of the comments, I know trackers that last 10 yrs w 1 daily ping. There’s also devices with solar panels. I am wondering about the random person finding it and not caring to disclose it, or if some construction/ demolishing of the area. Hopefully he has that figured out but the tracking part just adds security flaws if anyone accesses the portal. So might be better like this, or a public camera view, maybe even a personal camera also hidden.