Trackers are OK but often depend on cell phone signal.
That will often be absent in woodland or close to the ground in a crop (even if you have signal otherwise).
I have one of these on the arm - the idea being that it will flash for several days after the drone battery has died.
You would see flashing LEDs from a long way off after dark
The inbuilt battery seems to last for several year's worth of lights provided you don't forget to switch it off!.
https://www.amazon.com/Silicone-Weather-Resistant-Models-Multi-purpose/dp/B01E7GIFWW