mapping

Hi, I was just wondering if anyone here uses a GPS tracking tool to save the coordinates of the findings? If yes, which one are you using? Thank you!

So I've been thinking for a quite some time now about gridding off a park (on paper) with the help of a handheld GPS unit and Google Earth. Has anyone done this? I'm trying to hunt a huge park but not really overlap where I'm hunting. I'd also like to grid off some smaller parks as well. For a...