Went hunting on Naked Island this September. (Didn't get one) But I did drop my yellow Garmin Etrex Venture HC after spotting a group of deer in the next valley over.
We backtracked over and over and never found it. If someone has found it or sees it I'll buy them a beer (or six or twelve!) When turned on, my last name "Stauffacher" shows on the first screen.
This may be a waste of time, but from the flagging through the woods we're not the only ones who have been there before.