This is very cool, I might want to get one of those. I have a saddle cover for my Brooks saddle to keep it safe from the elements and to hide that it’s a nice saddle. It goes all the way around and covers the bottom, so something like that would hide the tracker. I’m not sure I can believe most bike thieves are looking very hard for trackers, but I suppose if they are becoming more popular then they will.

Only other place I can imagine is the seat tube but that looks too big for most seat tubes and I would thick it would mess up the signal. Maybe you could find a way to discretely tape it under your handle bars with bar tape?