Promise you won't come hunt GA?
Then I'll tell you what I do...
Shhh....
Download a map from your state game management site, usually just line drawings of the boundaries or public hunting land. Convert this to a .tif or .jpeg, upload into Google Earth (free program) as a "layer". Adjust the transparency of the layer so that you can see the satellite data through the map, then tweak to fit your hunting area. (Your layer image can be stretched in all directions to fit the satellite data) Hint - use roads, edges of fields, etc. as guidelines when stretching to fit.
When you have your game lands map lined up properly, start looking for likely places to ambush whatever it is you want to hunt. Switch between satellite view and topo map view for best results. Decide on a view spots, then write down or export the coordinates to your GPS. Scout in person, and happy hunting!
For a GPS, I wouldn't buy anything but Garmin. I'm stuck with a POS Magellan that will be the first target at the range when I replace it with a Garmin. Magellan is much cheaper, but don't be tempted. When they work, they are very accurate, but Magellan customer service is a joke and they don't support their products when a new version comes out. I've got an Eplorist 400 that was once a decent unit, but they no longer offer parts or service. It's all of 5 years old.