I use Maptech USGS Topographic series(sold by state) for hunting. The maps don't load into my Magellan Sportrack Map. However, I'm able to load waypoint and tracks to and from my GPS to the computer and vise versa. It works pretty slick.
I was able to walk trail(logging and deer), and save it in the unit. I than loaded the tracks into the topo software package , and it they gave me a better idea of my hunting area. They have a demo on their website.