Here's my first post...new member
I use an old Magellan 2000XL with no download capability, maps or anything, but I'll upgrade some day.
Mine has been invaluable, but not for finding my way back to the truck. I use mine to get me way back on public land and make sure I'm not trespassing on private.
I load in corners of public land sections as waypoints and walk way off the road. As long as I stay between the waypoints I'm legal. Without many prominant land marks, fences not even close to section lines and angry land owners, a compass and map alone don't cut it.
More than a few times I've been confronted by guides or landowners trying to kick me off "their" land. I pull out the GPS and map, show them the color of the section and how I got there and tell them its not theirs.
GPSs are great. I use the UTM coordinates to keep it simple, most maps have them along the borders.