I have my phone number on my drone in case someone finds it. I am also doing like Robin and trying out a Tile. Sure they are short range, sure it might not get updated by another user - but it is better than nothing. Cheap and easy....and they are showing up tommorow. Been looking for an excuse to play with them anyway.
Careful planning and a good preflight - and I hope to never have a fly away.... *fingers crossed*