Garmin Etrex, 100 bucks. It's a very basic GPS, no uploadable maps, none of that.....But.....you'll be able to find your way home. Pull up the waypoint you want to go to, select it, and a great big arrow pops up on the screen. Keep the arrow pointed in front of you, you'll walk right into it.

They're pretty cool, especially for as basic as they are.