Thinking it over, I'm going to use a large, printed unit map for my elk hunt this fall. I think I only need a GPS as a backup for finding my way back to my truck. And marking where the elk goes down if I have to make few trips (likely the case). I can probably just get an app for my black eye phone that will let me mark a way point and then hone my way back when I start the phone up again at the end of the day.