I use MapSource which came with my Garmin Rhino and purchased the 2008 topo maps for it this off-season. It hooks into Google Earth, big plus.

Now I have mapped out all of my leases proprty lines, interior roads, and waypoints for stands, feeders, fields, etc. With that I was able to map all of those features out on Google Earth and now have both a topo and aerial map of my property. Next step is tp take these files (.jpg) format to somewhere like Kinkos and have them print them out--preferably poster size--and have them laminated. I am also going to check into getting a transparency of the aerial to overlay onto the topo.