You should try Google Earth. It's a free download that is automatically updated with satelite images. You need broadband or high-speed internet access for it to work but you can get some really good maps that way. You can even put little pushpins on the maps where your stands are or mark trails. These are saved to your hard drive while the satelite images remain hosted by Google. That way the pushpins are still there the next time you open the program and when they update the images you get those automatically.